彭州气田雷口坡组碳酸盐岩储层构造裂缝特征预测

doi:10.3969/j.issn.1006-6535.2024.06.003

特种油气藏 ›› 2024, Vol. 31 ›› Issue (6): 24-31.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

李皋¹, 梁斌斌¹, 谢强², 何龙³, 上官自然¹, 杨旭¹

1.西南石油大学油气藏地质及开发工程全国重点实验室,四川成都 610500;
2.中国石油西南油气田分公司,四川成都 610051;
3.中国石化西南油气分公司,四川成都 610095

收稿日期:2023-12-21 修回日期:2024-09-10 出版日期:2024-12-25 发布日期:2025-01-22
作者简介:李皋(1976—),男,研究员,1999年毕业于西南石油学院地质专业,2005年毕业于西南石油大学油气井工程专业,获博士学位,现从事复杂油气藏储层保护、钻井井筒安全风险控制及地质工程一体化方面的研究工作。
基金资助:
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)

Prediction of Structural Fracture Characteristics of Carbonate Reservoir in Leikoupo Formation of Pengzhou Gas Field

Li Gao¹, Liang Binbin¹, Xie Qiang², He Long³, Shangguan Ziran¹, Yang Xu¹

1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Southwest Petroleum University,Chengdu,Sichuan 610500,China;
2. Petrochina Southwest Oil & Gas field Company,Chengdu,Sichuan 610051,China;
3. Sinopec Xi'nan Oil and Gas Field Branch,Chengdu,Sichuan 610095,China

Received:2023-12-21 Revised:2024-09-10 Online:2024-12-25 Published:2025-01-22

摘要/Abstract

摘要： 针对彭州气田雷口坡组构造裂缝分布特征及发育程度认识不清的问题,考虑沉积微相、层厚和层面的影响,建立了基于工程地质力学的碳酸盐岩地层构造裂缝预测方法,并以PZ-6井区雷四段为例,利用有限元方法开展了井区—单井跨尺度构造裂缝评价。结果表明:井区地层构造裂缝以斜交缝为主,断层区域构造裂缝线密度约为1.3 条/m;藻云坪、灰云坪沉积微相较其他沉积微相裂缝线密度更大,井区裂缝线密度统计结果和预测结果相对误差为6.83%,可在上述2个沉积微相中优先部署井位;单井地层构造裂缝预测结果和测井结果吻合程度为91.23%,层面处地层破裂系数大于1.2,表明层面处构造裂缝更发育;薄层受层面影响,其主应力变化更为明显,在施工中可根据单井构造裂缝分布预防井漏。研究结果对明确彭州气田雷口坡组气藏构造裂缝分布特征、层位优选、井位部署等具有重要意义。

关键词: 彭州气田, 雷口坡组, 构造裂缝, 沉积微相, 三维应力场

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 sedimentary 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 fractures.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.

Key words: Pengzhou Gas Field, Leikoupo Formation, structural fractures, sedimentary microfacies, three-dimensional stress field

中图分类号:

TE122.3

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.

Li Gao, Liang Binbin, Xie Qiang, He Long, Shangguan Ziran, Yang Xu. Prediction of Structural Fracture Characteristics of Carbonate Reservoir in Leikoupo Formation of Pengzhou Gas Field[J]. Special Oil & Gas Reservoirs, 2024, 31(6): 24-31.

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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

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