特种油气藏2024，Vol.31Issue(6)：24-31,8.DOI:10.3969/j.issn.1006-6535.2024.06.003
彭州气田雷口坡组碳酸盐岩储层构造裂缝特征预测
Prediction of Structural Fracture Characteristics of Carbonate Reservoir in Leikoupo Formation of Pengzhou Gas Field
摘要
Abstract
To address the issue of the ambiguous understanding of the distribution characteristics and development degree of structural fractures in Leikoupo Formation of Pengzhou Gas Field,taking into account the influence of sed-imentary microfacies,layer thickness and bedding plane,a prediction approach of structural fractures in carbonate strata based on engineering geomechanics was established.Taking the fourth member of Leikoupo Formation in PZ-6 well area as an example,the finite element method was employed to assess the trans-scale structural fractures of the well area and individual wells.The results demonstrate that the structural fractures in the well area are mainly oblique fractures,and the fracture linear density in the fault area is approximately 1.3 per metre.The fracture line density of algal dolomite flat and dolomite lime flat is greater than that of other sedimentary microfacies.The relative error between the statistical results and the prediction results of fracture line density in the well area is 6.83%,and the well location can be preferentially deployed in the above two sedimentary microfacies.The prediction results of structural fractures in single wells are in accordance with the logging results by 91.23%,and the formation fracture coefficient at the bedding plane is greater than 1.2,indicating that the structural fractures at the bedding plane are more developed.The thin layer is influenced by the layer,and the principal stress change is more obvious.During the construction,well leakage can be prevented in accordance with the distribution of single well structural frac-tures.The research results are of great significance to clarify the distribution characteristics of structural fractures,optimal selection of horizons and well location deployment in Leikoupo Formation of Pengzhou Gas Field.关键词
彭州气田/雷口坡组/构造裂缝/沉积微相/三维应力场Key words
Pengzhou Gas Field/Leikoupo Formation/structural fractures/sedimentary microfacies/three-dimen-sional stress field分类
能源科技引用本文复制引用
李皋,梁斌斌,谢强,何龙,上官自然,杨旭..彭州气田雷口坡组碳酸盐岩储层构造裂缝特征预测[J].特种油气藏,2024,31(6):24-31,8.基金项目
四川省自然科学基金"超深层裂缝性气层钻井复杂工况井筒瞬态流动特性及井口回压控制压力反馈规律研究"(2023NSFSC0929) （2023NSFSC0929）
