地质通报2025，Vol.44Issue(6)：1007-1020,14.DOI:10.12097/gbc.2024.01.009
鄂尔多斯盆地苏里格气田东南部马五段地层水分布规律、主控因素及其对油气开采量的影响
Distribution law and main controlling factors of formation water in the fifth member of the Majiagou Formation in the southeastern part of Sulige Gas Field,Ordos Basin and its influence on oil and gas exploitation
摘要
Abstract
[Objective]The reservoirs of the fifth member of the Ordovician Majiagou Formation in the southeastern part of the Sulige Gas Field are mainly carbonate reservoirs.During the production process,the formation water produced seriously,the gas-water relationship was complex,and the main controlling factors were unclear.Restricting natural gas production in the area.[Methods]Based on the analysis of the chemical characteristics of formation water,this paper uses parameters such as chlorine-sodium coefficient,desulfurization coefficient,and sodium-calcium coefficient to analyze the formation environment of formation water;then,it studies the formation environment of formation water through single well identification,continuous well comparison,and plane distribution characteristics.The distribution rules of gas and water;finally,the main controlling factors of gas and water distribution and their impact on oil and gas production were studied based on the structure,ancient landforms and reservoir physical properties.[Results]The results show that the formation water in the Ma51 subsection in the southeastern part of the Sulige gas field has high salinity,with an average of 148905.46 mg/L,PH shows weak to medium acidity,the water type is CaCl2 type,and the formation water overall is low chlorine The characteristics of sodium coefficient,sodium-calcium coefficient and desulfurization coefficient,high chlorine-magnesium coefficient,metamorphism coefficient and salinization coefficient make the formation sealing better,which is beneficial to the preservation of gas reservoirs.Vertically,the formation water is divided into structural low water,isolated lenticular water and low permeability zone retained water based on the differences in origin and spatial distribution.Water in structural low parts is common in the relatively low structures in the west of the study area and in the relatively high structures in the southeast.Low nasal recess;isolated lenticular water is less developed.On the plane,water-producing wells are mainly concentrated in five areas including G4-8 and S158.The eastern part has a larger water-bearing area and is mainly a gas-water mixing area.[Conclusions]The distribution of formation water is controlled by three factors:structure,pre-Carboniferous paleo-geomorphology and reservoir heterogeneity.Structural highs control the vertical gas-water differentiation,making it easier to produce water.Karst paleo-geomorphology controls the lateral distribution heterogeneity of gas and water,making the permeability of some areas low,affecting the development effect.Reservoir characteristics control the efficiency of gas-driven water.Reservoirs with better physical properties are rich in natural gas,and blocks with poor physical properties retain more water,affecting production.关键词
地层水/分布规律/主控因素/马家沟组/苏里格气田/鄂尔多斯盆地/油气开采量Key words
stratum water/distribution pattern/main control factor/Majiagou Formation/Sulige gas field/Ordos Basin/oil and gas production分类
天文与地球科学引用本文复制引用
张凯笑,郭艳琴,暴文博,孟宇涛,李百强,吴珍珍..鄂尔多斯盆地苏里格气田东南部马五段地层水分布规律、主控因素及其对油气开采量的影响[J].地质通报,2025,44(6):1007-1020,14.基金项目
陕西省重点研发计划一般项目《鄂尔多斯盆地长7页岩油储层分类评价及地质"甜点"》(编号:2023-YBGY-079) （编号:2023-YBGY-079）
西北大学大陆动力学国家重点实验室开放课题基金项目《鄂尔多斯盆地延长组重力流沉积及其储层评价》(编号:22LCD04) （编号:22LCD04）
陕西省技术创新引导专项基金项目《鄂尔多斯盆地浅层致密油高效开发压裂关键技术及工业化应用》(编号:2023-YD-CGZH-02)Supported by Shaanxi Provincial Key R&D Program General Project(No.2023-YBGY-079) （编号:2023-YD-CGZH-02）
Open Project Fund of the State Key Laboratory of Continental Dynamics,Northwest University(No.22LCD04) （No.22LCD04）
Shaanxi Provincial Technology Innovation Guidance Special Fund(No.2023-YD-CGZH-02) （No.2023-YD-CGZH-02）
