鄂尔多斯盆地庆阳气田上古生界气藏气水分布主控因素  

Main control factors of gas-water distribution in the Upper Paleozoic gas reservoirs of the Qingyang Gasfield in the Ordos Basin

作　　者：夏辉[1,2] 王龙 李娅[1,2] 张道锋[1,2] 张园园 朱望明[3] 张伟[1,2] 刘平 XIA Hui;WANG Long;LI Ya;ZHANG Daofeng;ZHANG Yuanyuan;ZHU Wangming;ZHANG Wei;LIU Ping(PetroChina Changqing Oilfield Company,Xi′an,Shaanxi 710018,China;National Engineering Laboratory for Exploration and Development of Low-Permeability Oil and Gas Fields,Xi′an,Shaanxi 710018,China;BGP INC.,China National Petroleum Corporation,Xi′an,Shaanxi 710021,China)

机构地区：[1]中国石油长庆油田分公司,陕西西安710018 [2]低渗透油气田勘探开发国家工程实验室,陕西西安710018 [3]中国石油集团东方地球物理勘探有限责任公司,陕西西安710021

出　　处：《特种油气藏》2025年第1期88-97,共10页Special Oil & Gas Reservoirs

基　　金：中国石油重大科技专项“致密砂岩气藏提高采收率关键技术研究”(2023ZZ25)。

摘　　要：庆阳气田上古生界气藏气水分布复杂,制约了气田的高效开发。针对这一问题,综合利用钻测井、三维地震、试气及生产数据等资料,系统开展地层水类型划分、气水分布规律及控制因素研究,明确气水分布主控因素。结果表明:研究区地层水主要赋存于山1段,盒8段产水层较局限,平面上可划分出中部高含水区以及西部、东部中含水区;地层水可划分为构造低部位滞留水、断裂破坏层间水及孤立透镜体水。构造低部位滞留水分布于研究区西部,受区域构造特征和生烃强度影响;断裂破坏层间水主要分布于研究区中部,受断裂体系控制;孤立透镜体水分布于研究区东部,主要受控于储层非均质性及运移距离。该研究成果为复杂构造背景致密砂岩气藏气水分布及天然气成藏研究提供了理论借鉴,也为后续气田效益开发提供了地质依据。The complex distribution of gas and water in the Upper Paleozoic gas reservoirs of Qingyang Gasfield restricts the efficient development of the gas field.To solve this problem,we comprehensively utilized data from drilling and logging wells,3D seismic,gas testing and production to systematically carry out study on the classification of formation water types,the distribution pattern of gas and water and the controlling factors,so as to clarify the main control factors for the distribution of gas and water.The results show that:the formation water in the study area is primarily distributed in the Shan 1 Member,with the water-producing layers in the He 8 Member being relatively limited.On a plane,a high water-bearing area in the center and medium water-bearing areas in the west and east can be delineated.The formation water can be categorized into structural low-lying trapped water,interlayer fracture water,and isolated lens-body water.Structural low-lying trapped water is distributed in the western part of the study area,influenced by regional tectonic characteristics and the intensity of hydrocarbon generation;interlayer fracture water is primarily found in the central part of the study area,controlled by the fault system;isolated lens body water is distributed in the eastern part of the study area,mainly controlled by the heterogeneity of the reservoir and the migration distance.This achievement provides theoretical reference for the study of gas-water distribution in tight sandstone gas reservoirs under complex structural backgrounds,as well as for the study of natural gas accumulation.It also offers geological basis for the subsequent efficient development of gas fields.

关 键 词：气水分布 控制因素 致密砂岩气藏 上古生界 庆阳气田 鄂尔多斯盆地 

分 类 号：TE133[石油与天然气工程—油气勘探]