Quantitative Prediction of Permeability of High Variable Geothermal Gradient Sandstone in Baiyun Deep Water Area of Northern South China Sea

被引：0
|
作者：
Chen S. [1 ,2 ]
Peng G. [1 ,2 ]
Zhang L. [1 ,2 ]
Liu B. [1 ,2 ]
Yan H. [1 ,2 ]
Zhang B. [1 ,2 ]
机构：
[1] Shenzhen Branch of CNOOC Ltd., Shenzhen
[2] CNOOC Deepwater Development Ltd., Shenzhen
来源：
Diqiu Kexue - Zhongguo Dizhi Daxue Xuebao/Earth Science - Journal of China University of Geosciences | 2022年 / 47卷 / 07期
关键词：
Baiyun deep water area; high and variable geothermal gradient; marine geology; permeability; quantitative geological prediction; sandstone diagenesis;
D O I：
10.3799/dqkx.2022.239
中图分类号：
学科分类号：
摘要：
How the geothermal gradient affects the diagenetic evolution of sandstone and the change of reservoir physical properties is a hot issue in the field of geosciences. Taking the Baiyun deep water area with a highly variable geothermal gradient distribution as an example, through the analysis of a large number of samples from different geothermal gradient areas, with a geothermal gradient of 0.1 ℃/100 m as the progressive interval, in this paper it compares and analyzes the variation trend of the permeability of sandstone reservoirs of different grain sizes with burial depth in different geothermal gradient intervals, establishes a quantitative geological prediction model of sandstone permeability and shows the inherent relationship between the reservoir properties of sandstone and the stratum geothermal gradient.The results show that within a certain buried depth range, with the increase of geothermal gradient, the difference of lower buried depth decreases step by step with the decrease of permeability by an order of magnitude. In the same geothermal gradient range, for pebbly sandstone, coarse-grained sandstone, medium-sized sandstone and fine-grained sandstone with high composition maturity and low plastic debris, the difference of lower limit of equal permeability between adjacent grain size sandstones is similar. With the increase of geothermal gradient, the difference of lower limit of equal permeability between adjacent grain size sandstones decreases regularly. The thickness of low permeability and ultra-low permeability sandstone reservoirs decreases with the increase of geothermal gradient, and the ultra-low permeability lower limit of coarse-grained sandstone can become the limit depth of deepwater conventional exploration. This study has important scientific significance for revealing the influence of geothermal gradient on the diagenetic evolution of sandstone and physical property evolution effect, and has a positive guiding role for oil and gas exploration. © 2022 China University of Geosciences. All rights reserved.
引用
收藏
页码：2468 / 2480
页数：12
相关论文
共 53 条
  • [1] Bloch S., Lander R.H., Bonnell L., Anomalously High Porosity and Permeability in Deeply Buried Sandstone Reservoirs: Origin and Predictability, AAPG Bulletin, 86, 2, pp. 301-328, (2002)
  • [2] Cao Y.C., Yuan G.H., Li X.Y., Et al., Types and Characteristics of Anomalously High Porosity Zones in Paleogene Mid-Deep Buried Reservoirs in the Northern Slope, Dongying Sag, Acta Petrolei Sinica, 34, 4, pp. 683-691, (2013)
  • [3] Chen S. H., Qiao P. J., Zhang H. H., Et al., Geochemical Characteristics of Oligocene Miocene Sediments from the Deepwater Area of the Northern South China Sea and Their Provenance Implications, Acta Oceanologica Sinica, 37, 2, pp. 35-43, (2018)
  • [4] Chen Y., Wang C.J., Sun X.F., Et al., Progress on Mineral Solubility and Mechanism of Dissolution Secondary Porosity Forming in Clastic Reservoir, Bulletin of Mineralogy, Petrology and Geochemistry, 34, 4, pp. 830-836, (2015)
  • [5] Cui Y.C., Cao L.C., Qiao P.J., Et al., Provenance Evolution of Paleogene Sequence (Northern South China Sea) Based on Detrital Zircon U Pb Dating Analysis, Earth Science, 43, 11, pp. 4169-4179, (2018)
  • [6] Cui Y. C., Shao L., Yu M. M., Et al., Formation of Hengchun Accretionary Prism Turbidites and Implications for Deep-Water Transport Processes in the Northern South China Sea, Acta Geologica Sinica (English Edition), 95, 1, pp. 55-65, (2021)
  • [7] Gao C.L., Ji Y.L., Jin J., Et al., Characteristics and Controlling Factors on Physical Properties of Deep Buried Favorable Reservoirs of the Qingshuihe Formation in Muosuowan Area, Junggar Basin, Journal of Jilin University (Earth Science Edition), 47, 4, pp. 990-1006, (2017)
  • [8] Gao C.L., Ji Y.L., Gao Z.Y., Et al., Multi-Factor Coupling Analysis on Property Preservation Process of Deep Buried Favorable Reservoir in Hinterland of Junggar Basin, Acta Sedimentologica Sinica, 35, 3, pp. 577-591, (2017)
  • [9] Gao H., Wu H.S., Zhang H.R., Research of Logging Facies Classification in Low Porosity and Low Permeability Reservoirs and Method of Permeability Evaluation in Yinggehai Basin, Journal of Oil and Gas Technology, 35, 7, pp. 87-92, (2013)
  • [10] Gu T., Characteristics of Abnormally High Porosity Zone and Favorable Reservoir Facies Prediction in Deep Cenozoic Horizon of Qingshui Sag, Natural Gas Geoscience, 19, 3, pp. 327-333, (2008)
123456