蓬莱气区射洪—盐亭区块灯四段储集层构造裂缝预测  

Prediction of Structural Fractures in Deng 4 Member Reservoirs in the Shehong-Yanting Block,Penglai Gas Field,Sichuan Basin

作　　者：李皋[1,2] 上官自然 杨旭 李红涛[1,2] 李泽 王秋彤[3] LI Gao;SHANGGUAN Ziran;YANG Xu;LI Hongtao;LI Ze;WANG Qiutong(State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Southwest Petroleum University,Chengdu,Sichuan 610500,China;Underbalanced/Gas Drilling Laboratory,National Engineering Research Center for Oil and Gas Drilling and Completion Technolo-gy,Chengdu,Sichuan 610500,China;Research Institute of Engineering Technology,Southwest Oil&Gas Field Company,PetroChina,Chengdu,Sichuan 610017,China)

机构地区：[1]西南石油大学油气藏地质及开发工程全国重点实验室,成都610500 [2]油气钻完井技术国家工程研究中心欠平衡/气体钻井实验室,成都610500 [3]中国石油西南油气田分公司工程技术研究院,成都610017

出　　处：《新疆石油地质》2025年第2期136-143,共8页Xinjiang Petroleum Geology

基　　金：国家自然科学基金(51674217);四川省自然科学基金(2023NSFSC0929)。

摘　　要：为确定四川盆地蓬莱气区射洪—盐亭区块灯影组灯四段储集层裂缝分布特征,在统计分析构造裂缝参数的基础上,基于岩石破裂准则、产状演化条件和现今应力场特征,通过构造应力场反演,对研究区灯四段超深碳酸盐岩储集层裂缝进行了定量预测。研究结果表明:灯四段构造剪切缝发育,斜交缝集中分布于东南构造高部位,高角度缝和直立缝多分布在断层附近,裂缝走向多为北西—南东向、北东—南西向和北北西—南南东向;裂缝线密度总体呈东南低、西北高的分布格局,裂缝开度分布则与之相反,裂缝孔隙度变化相对较小;裂缝参数特征在断层内部、断层附近及非断层部位具差异分布的特点,预测结果与实测结果基本一致。裂缝倾角、裂缝开度和孔隙度对气井产量影响显著。In order to determine the distribution of the fractures in the fourth member of the Dengying formation(Deng 4 member)in the Shehong-Yanting block of the Penglai gas field,Sichuan Basin,a statistical analysis was conducted on the structural fracture parameters.Based on rock rupture criteria,occurrence evolution conditions,and present-day stress field characteristics,a quantitative prediction of fractures in the ultra-deep carbonate reservoirs of the Deng 4 member were performed through tectonic stress field inversion.The results show that structural shear fractures are well developed in the Deng 4 member,oblique fractures are concentrated in the southeastern struc-tural highs,while high-angle and vertical fractures are mostly distributed near faults.The fracture strikes are predominantly NW-SE,NE-SW and NNW-SSE.The linear density of fracture is generally low in the southeast and high in the northwest,while the fracture aperture shows an opposite distribution pattern.The fracture porosity reflects a relatively small variation.Fracture parameters exhibit different distri-bution characteristics within fault zones,near faults,and in non-fault areas,with the predicted results being largely consistent with the mea-sured data.The fracture dip,aperture,and porosity significantly influence gas well productivity.

关 键 词：四川盆地 蓬莱气区 射洪 盐亭 灯影组 灯四段 力学模型 构造裂缝 

分 类 号：TE122.1[石油与天然气工程—油气勘探]