| 鄂尔多斯盆地化109区长2油藏注水开发政策研究 |
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| 引用本文： | 王娟,敬小军,方艳兵,吴大全,刘永川,罗晓莉.鄂尔多斯盆地化109区长2油藏注水开发政策研究[J].地下水,2019(1):121-125. |
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| 作者姓名： | 王娟 敬小军 方艳兵 吴大全 刘永川 罗晓莉 |
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| 作者单位： | 中国石油长庆油田分公司第四采油厂;西安中生界油气科技有限公司 |
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| 摘 要： | 化子坪区长2油层属于低渗、低产、低丰度的"三低"油藏。随着开发的进行,油藏进入高含水阶段,油藏采油能力不断下降,开发政策亟须调整。本文以化109区长2油藏为研究对象,利用实际生产数据和数值模拟技术,分析油藏开发现状,论证不同开发方案,提出相应开放政策。结果表明:经过多年注水开发,目前油藏年递减率为9. 2%,含水率91. 5%,年含水上升约0. 7%,开采程度10. 5%,地层压力保持水平较高。油藏剩余油丰富,主要集中在河道交汇处(河道边部)和井间微型正向构造处。经过油藏工程论证,油藏开发合理地层压力保持水平应为100%,合理注采比应为1. 0,合理注水强度应为4. 9 m3/m·d。应从扩边调整、注水调整和治理低产低效井三个方面调整注水开发政策,提高油藏开发水平。
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| 关 键 词： | 鄂尔多斯盆地 长2油藏 数值模拟 注水开发 技术政策 |
The Technical Policy of water Development for Chang2 Reservoir in Hua109 Area of Ordos Basin |
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| WANG Juan,JING Xiao-jun,FANG Yan-bing,WU Da-quan,LIU Yong-chuan,LUO Xiao-li.The Technical Policy of water Development for Chang2 Reservoir in Hua109 Area of Ordos Basin[J].Groundwater,2019(1):121-125. |
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| Authors: | WANG Juan JING Xiao-jun FANG Yan-bing WU Da-quan LIU Yong-chuan LUO Xiao-li |
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| Institution: | (No.2 Oil Production Company of PetroChina Changing,Yinchuan 750006,Ningxia;Xi'an Mesozoic Petrotech CO.LTD,Shaanxi 710020,Xi'an) |
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| Abstract: | Chang2 reservoir in Huaziping area Ordos Basin,which belonged to lowly infiltrates,lowly produces,low abundance.It is also called"three low"oil deposition.With the development of reservoir,the reservoir enters the high water cut stage,and the oil recovery capacity of the reservoir is declining continuously,so the development policy needs to be adjusted urgently.In this paper,Chang2 in Hua109 area is taken as the research object,to analyze reservoir development status,demonstrate different development schemes,and put forward corresponding development policies,by combining with actual production data and numerical simulation technology.The results show that:After years of development,the annual decline rate of reservoir is 9.2%,the water cut is 91.5%,the annual water cut rises by about 0.7%,recovery percent is 10.5%,and the formation pressure keeps high.The remaining oil in the reservoir is abundant,mainly concentrated at the intersection of rivers(the edge of rivers)and the micro-forward structure between wells.Through reservoir engineering demonstration,the reasonable formation pressure should be kept at 100%,the reasonable injection-production ratio should be 1.0,and the reasonable injection intensity should be 4.9 m^3/m·d.Technical policies should be adjusted from three aspects:border expansion,water injection and management of low production wells to improve reservoir development level. |
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| Keywords: | Ordos Basin Chang2 reservoir numerical simulation technology water development technical Policy |
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