鄂尔多斯盆地合水油田庄36区油井水淹规律
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摘要
鄂尔多斯盆地合水油田庄36区为典型的特低渗油藏,其开发过程中高含水油井多,开发效果差。对油井水淹情况分析得出该区油井水淹主要有2种类型,即缓慢上升型和暴性水淹型,而造成2种油井水淹类型的关键因素是油水井之间的注采对应性及裂缝发育。注采对应性是影响油井水淹的关键因素,在注采对应的情况下,如果油水井间砂体连通,无裂缝发育,油井将会缓慢水淹;不管砂体是否连通,如果存在裂缝,注入水沿着裂缝突进,造成油井暴性水淹。
Zhuang 36 Area in Heshui Oilfield is a typical ultra-low permeability oil reservoir.There are many high water-cut oil wells in the development process and the development effect is poor.Through the analysis of water-out performance of oil wells,it is concluded that there are two main types of water-out of oil wells in this area:slowly ascending type and sudden water flooding type.The key factors causing the two types of water-out are injection-production correspondence between oil and water wells and fracture development.The injection-production correspondence is the key factor affecting water flooding of oil wells.Under the corresponding conditions of injection and production,if the sand bodies between oil and water wells are connected and there are no fracture developed,the oil wells will be slowly flooded.Whether the sand body is connected or not,if there is a fracture,the injected water breaks through along the fracture,a sudden water flooding is induced.
Zhuang 36 Area in Heshui Oilfield is a typical ultra-low permeability oil reservoir.There are many high water-cut oil wells in the development process and the development effect is poor.Through the analysis of water-out performance of oil wells,it is concluded that there are two main types of water-out of oil wells in this area:slowly ascending type and sudden water flooding type.The key factors causing the two types of water-out are injection-production correspondence between oil and water wells and fracture development.The injection-production correspondence is the key factor affecting water flooding of oil wells.Under the corresponding conditions of injection and production,if the sand bodies between oil and water wells are connected and there are no fracture developed,the oil wells will be slowly flooded.Whether the sand body is connected or not,if there is a fracture,the injected water breaks through along the fracture,a sudden water flooding is induced.
引文
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[3] 曹雄伟.庄36区长8油藏开发动态分析研究[D].西安:西安石油大学,2018.
[4] 王友净,宋新民,田昌炳,等.动态裂缝是特低渗透油藏注水开发中出现的新的开发地质属性[J].石油勘探与开发,2015,42(2):222～228.
[5] 赵良金,黄新文,王军,等.文东油田沙河街组三段中亚段油藏裂缝发育规律及其对注水开发的影响[J].石油与天然气地质,2009,30(1):102～107.
[6] 赵向原,曾联波,靳宝光,等.低渗透油藏注水诱导裂缝特征及形成机理——以鄂尔多斯盆地安塞油田长6油藏为例[J].石油与天然气地质,2018,39(4):696～705.
[7] 王文环,彭媛媛,李光泉,等.特低渗透油藏水驱规律及最佳驱替模式[J].石油与天然气地质,2019,40(1):182～189.
[8] 宋正江.大庆油区头台油田扶余油层小排距注水中后期综合调整方法[J].油气地质与采收率,2011,18(1):85～88.
[9] 郭粉转,刘滨,荆冠军,等.水平缝发育低-超低渗透油藏注水开发特征[J].特种油气藏,2018,25(1):108～111.
[10] 李小波,容元帅,龙喜彬,等.缝洞型油藏强边、底水窜进油井特征及机理研究[J].西南石油大学学报(自然科学版),2015,37(1):135～140.
[11] 张世龙,贝君平,徐涛.渤南油田三区沙三段4砂组水淹规律及影响因素研究[J].石油天然气学报(江汉石油学院学报),2014,36(3):96～100.
[12] 乔霞,刘卫丽,聂延波,等.块状边地水油藏水淹规律研究[J].长江大学学报(自然科学版),2014,11(32):83～86.