Diagenetic Evolution of Syngenetic Volcanogenic Sediment and Their Influence on Sandstone Reservoir: A Case Study in the Southern Huizhou Sag, Pearl River Mouth Basin, Northern South China Sea
Abstract
:1. Introduction
2. Geological Setting
3. Materials and Methods
4. Results
4.1. Lithofacies and Petrography of the Wenchang-Enping Formation
4.2. Diagenetic Events
4.2.1. Compaction
4.2.2. Cementation
- Carbonate Cementation
- Clay Mineral Cementation
- Siliceous Cementation
- Pyrite Cementation
4.2.3. Dissolution
4.3. Pore Type and Reservoir Physical Property
4.4. Characteristic and Differential of Volcanogenic Sediment
5. Discussion
5.1. Influence of Volcanogenic Sediment on Reservoir
5.2. Diagenetic Evolution Sequence
5.3. Formation Mechanism of the Pyroclastic Rock
6. Conclusions
- (1)
- For the Wenchang Formation, the main lithology is litharenite and feldspathic litharenite, with high content of interstitial material, mainly tuffaceous matrix, and the main pore type is secondary dissolved pores, with an average porosity and permeability of 11.1% and 12.7 mD. For the Enping Formation, the main lithology is lithic arkose and subarkose, with a low content of interstitial materials and complex types. The main pore type is primary pore, with an average porosity and permeability of 11.3% and 294.3 mD.
- (2)
- The magmatic property was mainly intermediate-basic. The types of volcanic materials in the Huizhou Sag were complex. Coarse-grained volcanic fragments could enhance the compressive strength of the reservoir, and the dissolution could effectively increase the physical properties of the reservoir. Fine-grained volcanic dust filled the pores as interstitial materials, resulting in the tightness of the reservoir.
- (3)
- The reservoirs underwent a diagenetic evolution process that was broadly alkaline to acidic and finally alkaline; the diagenesis sequence is summarized as follows: (i) compaction, (ii) clay mineral cladding, (iii) feldspar and coarse-grained volcanic fragment dissolution, (iv) kaolinite and quartz cementation, (v) fine-grained tuffaceous alteration, (vi) calcite cementation, (vii) hydrocarbon charge and (viii) late ankerite and pyrite cementation.
- (4)
- During the period of the Wenchang Formation, strong tectonic activity led to strong volcanic activity, with many volcanic materials mixed into the terrigenous clasts. The rapid sedimentation of the fan delta resulted in lower reservoir maturity and stronger compaction. The dissolution of feldspar and rock fragments generated dissolution pores, increasing porosity, but the clay minerals produced by alteration would block the throat and reduce the reservoir permeability. During the period of the Enping Formation, the volcanic activity was weakened, and the type of volcanic material was mainly fine-grained volcanic dust. The change of sedimentary facies led to the increase of reservoir maturity and weaker compaction. It was difficult for acid fluid to effectively enter the Enping Formation to form dissolution pores, so the content of altered clay minerals was low, resulting in better physical properties.
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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WELL | DEPTH | STRATA | Q | F | VRF | MRF | SRF | MICA | AM | TM | CC | CM | SC | PY |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
H1 | 3158.4 | EP | 62.0 | 28.0 | 6.5 | 0.0 | 0.0 | 3.5 | 19.0 | 5.0 | 0.0 | 0.0 | 0.0 | 0.5 |
H1 | 3184 | EP | 82.5 | 7.5 | 9.5 | 0.5 | 0.0 | 0.0 | 1.0 | 5.0 | 22.0 | 0.5 | 1.5 | 0.0 |
H1 | 3200 | EP | 51.0 | 10.0 | 38.0 | 0.0 | 0.0 | 1.0 | 0.0 | 5.0 | 0.5 | 15.0 | 0.0 | 2.5 |
H1 | 3226 | EP | 33.5 | 39.0 | 24.0 | 1.0 | 0.0 | 2.5 | 0.0 | 5.0 | 0.0 | 13.0 | 0.0 | 0.0 |
H1 | 3226 | EP | 41.0 | 33.5 | 25.0 | 0.0 | 0.0 | 0.5 | 0.0 | 5.0 | 0.0 | 15.0 | 0.0 | 0.0 |
H1 | 3234.5 | EP | 36.0 | 9.0 | 54.0 | 0.0 | 0.0 | 1.0 | 0.0 | 5.0 | 0.0 | 5.0 | 0.0 | 0.0 |
H1 | 3235 | EP | 31.0 | 6.0 | 61.0 | 0.0 | 0.0 | 2.0 | 0.0 | 5.0 | 0.5 | 0.5 | 0.0 | 0.0 |
H1 | 3399.4 | WC | 41.0 | 11.0 | 48.0 | 0.0 | 0.0 | 0.0 | 0.0 | 10.0 | 0.0 | 10.0 | 0.0 | 0.0 |
H1 | 3503.5 | WC | 54.0 | 24.5 | 21.0 | 0.0 | 0.0 | 0.5 | 0.0 | 8.0 | 0.0 | 10.0 | 0.5 | 0.0 |
H1 | 3582 | WC | 31.0 | 46.5 | 22.5 | 0.0 | 0.0 | 0.0 | 20.0 | 15.0 | 0.0 | 0.0 | 0.0 | 0.0 |
H3 | 3166.5 | EP | 79.6 | 14.0 | 5.1 | 0.6 | 0.6 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 1.0 | 0.0 |
H3 | 3182 | EP | 73.6 | 16.0 | 7.4 | 0.0 | 3.1 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 1.0 | 0.0 |
H3 | 3211 | EP | 79.8 | 13.1 | 6.0 | 1.2 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 1.0 | 0.0 |
H3 | 3223 | EP | 64.3 | 15.5 | 20.2 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 1.0 | 0.0 |
H3 | 3266.5 | EP | 78.3 | 12.0 | 7.8 | 0.6 | 1.2 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 1.0 | 0.0 |
H3 | 3281.5 | EP | 77.8 | 12.6 | 5.2 | 1.5 | 0.0 | 3.0 | 1.0 | 0.0 | 0.0 | 0.5 | 0.0 | 0.0 |
H3 | 3304 | EP | 78.1 | 9.5 | 10.1 | 0.0 | 0.0 | 2.4 | 0.0 | 6.0 | 1.5 | 0.0 | 0.5 | 0.0 |
H3 | 3360 | EP | 63.9 | 9.6 | 23.5 | 0.0 | 0.6 | 2.4 | 0.0 | 0.0 | 0.0 | 0.0 | 1.0 | 0.0 |
H3 | 3380 | EP | 59.5 | 7.7 | 27.4 | 0.0 | 0.6 | 4.8 | 0.0 | 16.0 | 0.0 | 0.0 | 0.0 | 0.0 |
H3 | 3521 | EP | 82.1 | 11.4 | 5.7 | 0.0 | 0.8 | 0.0 | 15.0 | 0.0 | 0.0 | 0.0 | 1.0 | 0.0 |
H3 | 3572.5 | WC | 54.0 | 10.4 | 29.4 | 0.0 | 4.9 | 1.2 | 0.0 | 0.0 | 0.0 | 0.0 | 1.0 | 0.0 |
H3 | 3583 | WC | 74.1 | 14.5 | 9.6 | 0.0 | 1.2 | 0.6 | 0.0 | 0.0 | 0.0 | 0.0 | 1.0 | 0.0 |
H3 | 3596 | WC | 56.6 | 6.0 | 34.9 | 0.0 | 0.0 | 2.4 | 0.0 | 16.0 | 0.0 | 0.0 | 0.0 | 0.0 |
H3 | 3615 | WC | 60.0 | 8.2 | 30.0 | 0.0 | 1.8 | 0.0 | 0.0 | 1.0 | 0.0 | 0.0 | 1.0 | 0.0 |
H3 | 3719.5 | WC | 38.6 | 4.2 | 56.6 | 0.0 | 0.6 | 0.0 | 0.0 | 2.0 | 0.0 | 0.0 | 0.5 | 0.0 |
H3 | 3726 | WC | 50.7 | 23.3 | 23.3 | 1.4 | 1.4 | 0.0 | 0.0 | 16.5 | 0.5 | 0.5 | 1.0 | 0.0 |
H3 | 3791 | WC | 45.2 | 7.1 | 47.6 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 6.0 | 0.0 | 0.0 |
H3 | 3794 | WC | 62.0 | 12.7 | 25.3 | 0.0 | 0.0 | 0.0 | 0.0 | 10.0 | 0.0 | 0.0 | 0.0 | 0.0 |
H3 | 3798 | WC | 42.5 | 11.0 | 45.2 | 0.0 | 1.4 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
H3 | 3801.5 | WC | 44.9 | 15.4 | 38.5 | 0.0 | 0.0 | 1.3 | 0.0 | 22.0 | 0.0 | 0.0 | 0.0 | 0.0 |
H3 | 3816.5 | WC | 63.3 | 15.2 | 20.3 | 0.0 | 1.3 | 0.0 | 0.0 | 3.0 | 0.0 | 0.0 | 0.0 | 0.0 |
H4A | 3600 | WC | 49.4 | 4.5 | 46.1 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
H4A | 3705 | WC | 34.9 | 10.5 | 54.7 | 0.0 | 0.0 | 0.0 | 0.0 | 6.0 | 0.0 | 0.0 | 0.0 | 0.0 |
H4A | 3808.5 | WC | 73.3 | 12.8 | 14.0 | 0.0 | 0.0 | 0.0 | 0.0 | 12.0 | 0.0 | 0.0 | 0.0 | 0.0 |
H4A | 3820.15 | WC | 67.8 | 12.1 | 18.4 | 0.0 | 0.6 | 1.1 | 0.0 | 12.0 | 0.0 | 0.0 | 0.0 | 0.0 |
H4A | 3821.4 | WC | 72.4 | 8.2 | 18.8 | 0.0 | 0.0 | 0.6 | 0.0 | 12.0 | 0.0 | 0.0 | 0.0 | 0.0 |
H4A | 3822.97 | WC | 75.9 | 8.0 | 14.9 | 0.0 | 0.0 | 1.1 | 0.0 | 11.0 | 0.0 | 0.0 | 0.0 | 2.0 |
H4A | 3823.5 | WC | 79.8 | 8.3 | 11.9 | 0.0 | 0.0 | 0.0 | 0.0 | 10.0 | 0.0 | 0.0 | 0.0 | 0.0 |
H4A | 3824.45 | WC | 75.6 | 9.8 | 14.6 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 18.0 | 0.0 | 0.0 | 0.0 |
H4A | 3825.41 | WC | 85.9 | 9.4 | 4.7 | 0.0 | 0.0 | 0.0 | 0.0 | 12.0 | 0.0 | 0.0 | 0.0 | 0.0 |
H4A | 3826.19 | WC | 84.3 | 10.8 | 4.8 | 0.0 | 0.0 | 0.0 | 0.0 | 9.0 | 4.0 | 0.0 | 0.0 | 1.5 |
H4A | 3827.5 | WC | 68.1 | 15.0 | 16.3 | 0.6 | 0.0 | 0.0 | 0.0 | 15.0 | 0.0 | 0.0 | 5.0 | 0.0 |
H4A | 3828.12 | WC | 73.9 | 12.7 | 13.4 | 0.0 | 0.0 | 0.0 | 0.0 | 12.0 | 5.0 | 0.0 | 0.0 | 0.0 |
H4A | 3829.43 | WC | 63.6 | 16.4 | 20.0 | 0.0 | 0.0 | 0.0 | 45.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
H4A | 3830.86 | WC | 71.6 | 14.9 | 13.5 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 26.0 | 0.0 | 0.0 | 0.0 |
H4A | 3831.96 | WC | 63.5 | 21.2 | 15.3 | 0.0 | 0.0 | 0.0 | 0.0 | 13.5 | 1.0 | 0.0 | 0.5 | 0.0 |
H4A | 3832.93 | WC | 83.3 | 11.9 | 3.6 | 0.0 | 0.0 | 1.2 | 0.0 | 12.5 | 0.0 | 0.0 | 0.5 | 0.0 |
H4A | 3833.68 | WC | 76.1 | 11.4 | 12.5 | 0.0 | 0.0 | 0.0 | 0.0 | 12.0 | 0.0 | 0.0 | 0.0 | 0.0 |
H4A | 3834.59 | WC | 71.6 | 6.2 | 21.0 | 0.0 | 0.0 | 1.2 | 0.0 | 19.0 | 0.0 | 0.0 | 0.0 | 0.0 |
H4A | 3835.45 | WC | 82.1 | 8.3 | 9.5 | 0.0 | 0.0 | 0.0 | 0.0 | 12.0 | 0.0 | 0.0 | 0.5 | 0.0 |
H4A | 3836.7 | WC | 80.4 | 7.6 | 12.0 | 0.0 | 0.0 | 0.0 | 0.0 | 14.0 | 0.0 | 0.0 | 0.0 | 0.0 |
H4A | 3837.43 | WC | 77.0 | 9.2 | 13.8 | 0.0 | 0.0 | 0.0 | 0.0 | 10.0 | 0.0 | 0.0 | 0.0 | 0.0 |
H4A | 3848.5 | WC | 76.6 | 14.3 | 9.1 | 0.0 | 0.0 | 0.0 | 0.0 | 12.0 | 0.0 | 0.0 | 0.0 | 0.0 |
H4A | 3868.3 | WC | 78.6 | 11.9 | 9.5 | 0.0 | 0.0 | 0.0 | 0.0 | 11.0 | 0.0 | 0.0 | 0.0 | 0.0 |
H4A | 3871 | WC | 69.0 | 19.0 | 11.9 | 0.0 | 0.0 | 0.0 | 16.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
H4A | 3873.6 | WC | 76.5 | 12.3 | 11.1 | 0.0 | 0.0 | 0.0 | 0.0 | 5.0 | 0.0 | 0.0 | 0.0 | 0.0 |
H4A | 3879 | WC | 75.9 | 16.5 | 7.6 | 0.0 | 0.0 | 0.0 | 0.0 | 5.0 | 0.0 | 0.0 | 0.0 | 0.0 |
H4A | 3883.3 | WC | 76.1 | 9.1 | 14.8 | 0.0 | 0.0 | 0.0 | 0.0 | 7.5 | 0.0 | 0.0 | 0.5 | 0.0 |
H4A | 3886.5 | WC | 73.9 | 10.2 | 15.9 | 0.0 | 0.0 | 0.0 | 0.0 | 11.0 | 0.5 | 0.0 | 0.0 | 0.0 |
H4A | 3897 | WC | 76.2 | 16.7 | 7.1 | 0.0 | 0.0 | 0.0 | 0.0 | 12.0 | 0.0 | 0.0 | 0.0 | 0.0 |
H4A | 3907.5 | WC | 68.3 | 13.4 | 18.3 | 0.0 | 0.0 | 0.0 | 0.0 | 10.0 | 0.0 | 0.0 | 0.0 | 0.0 |
H4A | 3912.5 | WC | 57.6 | 5.9 | 10.6 | 0.0 | 25.9 | 0.0 | 0.0 | 10.0 | 0.0 | 0.0 | 0.0 | 0.0 |
H4A | 4082 | WC | 73.6 | 10.3 | 16.1 | 0.0 | 0.0 | 0.0 | 0.0 | 6.0 | 0.0 | 0.0 | 0.0 | 0.0 |
H4A | 4094 | WC | 49.7 | 10.1 | 40.2 | 0.0 | 0.0 | 0.0 | 0.0 | 15.0 | 0.0 | 0.0 | 0.0 | 0.0 |
H4A | 4109 | WC | 46.4 | 8.3 | 45.2 | 0.0 | 0.0 | 0.0 | 0.0 | 13.5 | 0.0 | 0.0 | 0.0 | 0.0 |
H5 | 3113.8 | EP | 74.5 | 17.5 | 4.0 | 4.0 | 0.0 | 0.0 | 7.0 | 2.0 | 0.0 | 0.0 | 1.5 | 0.5 |
H5 | 3120.47 | EP | 79.5 | 16.5 | 3.5 | 0.5 | 0.0 | 0.0 | 3.0 | 2.0 | 0.0 | 0.0 | 0.5 | 1.0 |
H5 | 3125.15 | EP | 77.0 | 9.0 | 6.0 | 5.0 | 1.0 | 2.0 | 4.0 | 5.0 | 0.0 | 1.5 | 0.0 | 0.5 |
H5 | 3134.42 | EP | 71.5 | 17.5 | 6.5 | 4.0 | 0.0 | 0.5 | 1.0 | 3.0 | 0.0 | 0.0 | 0.5 | 1.0 |
H5 | 3136.41 | EP | 73.0 | 17.0 | 8.0 | 2.0 | 0.0 | 0.0 | 0.0 | 5.0 | 3.0 | 0.0 | 1.5 | 0.0 |
H5 | 3160 | EP | 74.5 | 18.0 | 5.5 | 1.5 | 0.5 | 0.0 | 4.5 | 5.0 | 0.0 | 1.5 | 2.0 | 0.0 |
H5 | 3186.5 | EP | 76.5 | 15.5 | 7.0 | 0.5 | 0.5 | 0.0 | 0.0 | 5.0 | 0.0 | 0.0 | 2.0 | 0.0 |
H5 | 3195 | EP | 68.0 | 21.5 | 4.0 | 6.0 | 0.0 | 0.5 | 0.0 | 5.0 | 0.0 | 0.0 | 2.0 | 0.0 |
H5 | 3206 | EP | 79.0 | 5.0 | 16.0 | 0.0 | 0.0 | 0.0 | 3.5 | 15.0 | 0.0 | 9.0 | 0.5 | 1.0 |
H5 | 3284 | EP | 77.0 | 17.0 | 6.0 | 0.0 | 0.0 | 0.0 | 0.0 | 5.0 | 0.0 | 0.0 | 1.0 | 0.0 |
H5 | 3288 | EP | 76.0 | 18.0 | 5.0 | 0.0 | 1.0 | 0.0 | 0.0 | 5.0 | 0.0 | 0.0 | 1.5 | 0.0 |
H5 | 3314 | EP | 74.0 | 11.5 | 7.0 | 5.5 | 1.0 | 1.0 | 7.0 | 15.0 | 0.0 | 0.0 | 2.0 | 0.5 |
H5 | 3421 | EP | 70.5 | 16.5 | 8.5 | 4.0 | 0.5 | 0.0 | 1.0 | 10.0 | 0.0 | 12.0 | 2.0 | 0.5 |
H5 | 3425 | EP | 75.0 | 14.5 | 9.0 | 0.0 | 1.5 | 0.0 | 0.0 | 5.0 | 6.0 | 5.5 | 1.0 | 0.5 |
H5 | 3429.5 | EP | 79.5 | 14.0 | 5.5 | 1.0 | 0.0 | 0.0 | 1.0 | 10.0 | 1.5 | 3.5 | 3.0 | 1.0 |
H5 | 3433.6 | EP | 74.5 | 16.5 | 6.5 | 2.5 | 0.0 | 0.0 | 1.5 | 15.0 | 0.0 | 7.0 | 2.0 | 0.0 |
H5 | 3524.6 | EP | 73.5 | 14.5 | 9.5 | 0.0 | 0.0 | 2.5 | 17.0 | 20.0 | 0.0 | 0.0 | 0.0 | 0.0 |
H5 | 3553 | EP | 74.5 | 14.5 | 6.0 | 0.5 | 0.0 | 4.5 | 18.0 | 22.0 | 0.0 | 0.0 | 0.0 | 0.0 |
H5 | 3554.5 | EP | 80.0 | 15.5 | 3.0 | 0.0 | 0.5 | 1.0 | 7.0 | 5.0 | 1.0 | 1.0 | 0.5 | 0.0 |
H5 | 3581 | EP | 79.5 | 16.0 | 3.5 | 0.5 | 0.5 | 0.0 | 0.0 | 5.0 | 1.0 | 0.5 | 4.0 | 0.0 |
H7 | 3462 | EP | 73.5 | 18.5 | 4.0 | 3.0 | 0.5 | 0.5 | 0.0 | 0.0 | 0.0 | 0.0 | 2.0 | 0.0 |
H7 | 3480 | EP | 72.5 | 19.0 | 2.0 | 4.5 | 1.0 | 1.0 | 1.0 | 0.0 | 0.0 | 0.0 | 2.0 | 0.0 |
H7 | 3514 | EP | 77.5 | 14.5 | 5.0 | 3.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 2.0 | 0.0 |
H7 | 3632 | EP | 70.5 | 21.0 | 3.5 | 4.0 | 0.5 | 0.5 | 1.0 | 0.0 | 0.0 | 0.5 | 1.0 | 0.5 |
H7 | 3649.5 | EP | 65.5 | 24.0 | 6.0 | 4.0 | 0.0 | 0.5 | 1.0 | 1.0 | 0.0 | 0.5 | 1.5 | 0.0 |
H7 | 3660 | EP | 79.0 | 4.5 | 5.5 | 10.5 | 0.0 | 0.5 | 0.0 | 2.0 | 0.0 | 0.0 | 0.5 | 0.0 |
H7 | 3672.5 | EP | 68.0 | 23.5 | 7.5 | 1.0 | 0.0 | 0.0 | 1.5 | 0.0 | 0.0 | 0.0 | 3.0 | 1.5 |
H7 | 3676.5 | EP | 68.0 | 24.0 | 4.5 | 3.0 | 0.0 | 0.5 | 9.0 | 0.0 | 0.5 | 0.5 | 3.0 | 0.0 |
H7 | 3684 | EP | 54.0 | 21.0 | 12.0 | 12.5 | 0.0 | 0.5 | 17.0 | 0.0 | 0.0 | 0.5 | 1.5 | 0.5 |
H7 | 3690.3 | EP | 84.0 | 5.5 | 3.5 | 6.0 | 0.0 | 1.0 | 0.0 | 0.5 | 0.0 | 1.5 | 2.0 | 0.0 |
H7 | 3700 | EP | 67.0 | 20.5 | 9.0 | 3.5 | 0.0 | 0.0 | 0.0 | 0.0 | 0.3 | 0.2 | 3.0 | 0.0 |
H7 | 3715 | EP | 78.0 | 9.5 | 12.0 | 0.5 | 0.0 | 0.0 | 3.0 | 1.0 | 0.0 | 3.0 | 0.5 | 0.0 |
H7 | 3721.5 | EP | 69.5 | 20.5 | 6.0 | 3.5 | 0.0 | 0.5 | 1.0 | 0.0 | 0.0 | 0.0 | 2.0 | 0.5 |
H7 | 3738 | EP | 67.5 | 26.5 | 3.0 | 1.0 | 0.0 | 2.0 | 1.0 | 1.0 | 0.0 | 5.0 | 1.0 | 0.0 |
H7 | 3743 | EP | 63.0 | 23.5 | 6.0 | 5.5 | 0.0 | 2.0 | 3.5 | 0.0 | 0.5 | 0.5 | 3.0 | 1.0 |
H7 | 3758 | EP | 67.5 | 25.5 | 2.0 | 1.0 | 0.0 | 4.0 | 0.5 | 3.0 | 0.0 | 3.0 | 1.0 | 0.5 |
H7 | 3807 | EP | 64.0 | 22.0 | 6.5 | 5.5 | 0.0 | 2.0 | 1.0 | 1.0 | 0.0 | 4.0 | 1.0 | 0.5 |
H7 | 3835 | EP | 67.0 | 22.0 | 6.0 | 4.5 | 0.0 | 0.5 | 3.0 | 1.0 | 9.0 | 0.0 | 0.5 | 0.0 |
H7 | 3842 | EP | 64.5 | 24.0 | 0.5 | 3.5 | 0.0 | 7.5 | 0.5 | 1.5 | 0.0 | 2.5 | 0.5 | 0.5 |
H7 | 3969 | EP | 53.0 | 14.0 | 4.5 | 25.5 | 0.0 | 3.0 | 16.0 | 0.5 | 1.5 | 0.0 | 0.0 | 0.0 |
H7 | 3974 | EP | 65.5 | 16.5 | 7.5 | 9.5 | 0.0 | 1.0 | 0.0 | 0.0 | 15.0 | 0.0 | 0.0 | 0.0 |
H7 | 4001 | WC | 63.0 | 26.0 | 4.5 | 6.5 | 0.0 | 0.0 | 0.0 | 11.0 | 7.5 | 0.0 | 0.0 | 0.5 |
H7 | 4029.4 | WC | 70.5 | 17.0 | 6.5 | 3.5 | 2.0 | 0.5 | 7.0 | 6.5 | 0.5 | 0.0 | 1.0 | 0.0 |
H7 | 4051 | WC | 67.0 | 15.0 | 5.5 | 11.5 | 0.0 | 1.0 | 0.5 | 6.5 | 2.5 | 0.0 | 0.0 | 0.0 |
Component, Pore, Porosity and Permeability | Enping Formation | Wenchang Formation | ||
---|---|---|---|---|
Range | Average | Range | Average | |
Quartz/% | 31.0−84.0 | 69.3 | 31.0−85.9 | 65.2 |
Feldspar/% | 4.5−39.0 | 16.6 | 4.2−46.5 | 12.9 |
Volcanic rock fragment/% | 0.5−61.0 | 10.0 | 3.6−56.6 | 20.4 |
Metamorphic rock fragment/% | 0.0−25.5 | 2.7 | 0.0−11.5 | 0.5 |
Sedimentary rock fragment/% | 0.0−3.1 | 0.3 | 0.0−25.9 | 0.8 |
Mica/% | 0.0−7.5 | 1.1 | 0.0−2.4 | 0.2 |
Argillaceous matrix/% | 0.0−19.0 | 3.0 | 0.0−45.5 | 1.7 |
Tuffaceous matrix/% | 0.0−22.0 | 4.0 | 0.0−22.0 | 8.8 |
Carbonate cement/% | 0.0−22.0 | 1.1 | 0.0−26.0 | 1.3 |
Clay mineral/% | 0.0−15.0 | 1.9 | 0.0−10.0 | 0.5 |
Siliceous cement/% | 0.0−4.0 | 1.2 | 0.0−5.0 | 0.3 |
Pyrite/% | 0.0−2.5 | 0.3 | 0.0−2.0 | 0.1 |
Primary pore/% | 0.0−40.0 | 5.7 | 0.0−24.0 | 1.9 |
Interparticle pore/% | 0.0−4.5 | 0.2 | 0.0−14.0 | 1.9 |
Intragranular pore/% | 0.0−2.5 | 0.6 | 0.0−8.0 | 1.3 |
Intercrystalline pore/% | 0.0−2.0 | 0.2 | 0.0−0.5 | 0.0 |
Microfracture/% | 0.0−0.1 | 0.0 | 0.0−4.0 | 0.1 |
Porosity/% | 1.5−18.7 | 11.3 | 1.2−20.5 | 11.1 |
Permeability/mD | 0.01−4119.7 | 297.3 | 0.01−411.0 | 12.7 |
Wells | H1 | H2 | H3 | H4A | H5 | H7 |
---|---|---|---|---|---|---|
EP | 5.0% (<0.24 mm) | 11.6% (<0.2 mm) | 2.2% (<0.15 mm) | / | 8.2% (<0.35 mm) | 0.6% (<0.2 mm) |
WC | 11.0% (0.3–2 mm) | / | 6.4% (0.2–0.5 mm) | 9.5% (0.2–1 mm) | / | 8% (0.2–0.4 mm) |
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Chen, J.; Zhu, H.; Peng, G.; Ding, L.; Zeng, Z.; Wang, W.; Tao, W.; Zhou, F. Diagenetic Evolution of Syngenetic Volcanogenic Sediment and Their Influence on Sandstone Reservoir: A Case Study in the Southern Huizhou Sag, Pearl River Mouth Basin, Northern South China Sea. J. Mar. Sci. Eng. 2024, 12, 1459. https://doi.org/10.3390/jmse12081459
Chen J, Zhu H, Peng G, Ding L, Zeng Z, Wang W, Tao W, Zhou F. Diagenetic Evolution of Syngenetic Volcanogenic Sediment and Their Influence on Sandstone Reservoir: A Case Study in the Southern Huizhou Sag, Pearl River Mouth Basin, Northern South China Sea. Journal of Marine Science and Engineering. 2024; 12(8):1459. https://doi.org/10.3390/jmse12081459
Chicago/Turabian StyleChen, Jiahao, Hongtao Zhu, Guangrong Peng, Lin Ding, Zhiwei Zeng, Wei Wang, Wenfang Tao, and Fengjuan Zhou. 2024. "Diagenetic Evolution of Syngenetic Volcanogenic Sediment and Their Influence on Sandstone Reservoir: A Case Study in the Southern Huizhou Sag, Pearl River Mouth Basin, Northern South China Sea" Journal of Marine Science and Engineering 12, no. 8: 1459. https://doi.org/10.3390/jmse12081459