致密油藏水平井注水吞吐效果评价方法  

Evaluation Method of Water-flood Stimulation Effect of Horizontal Wells in Tight Oil Reservoirs

作　　者：邸士莹 程时清[1] 代力 李旺东 缪立南[4] 刘琦 Di Shiying;Cheng Shiqing;Dai Li;Li Wangdong;Miao Li′nan;Liu Qi(China University of Petroleum(Beijing),Beijing 102249,China;PetroChina Tarim Oilfield Company,Tarim,Xinjiang 843399,China;Yanchang Oil Field Co.,Ltd.,Jingbian,Shaanxi 718500,China;PetroChina Daqing Oilfield Co.,Ltd.,Daqing,Heilongjiang 163458,China;PetroChina Tuha Oilfield Company,Hami,Xinjiang 839000,China)

机构地区：[1]中国石油大学(北京),北京102249 [2]中国石油塔里木油田分公司,新疆塔里木843399 [3]延长油田股份有限公司,陕西靖边718500 [4]中国石油大庆油田有限责任公司,黑龙江大庆163458 [5]中国石油吐哈油田分公司,新疆哈密839000

出　　处：《特种油气藏》2022年第2期91-97,共7页Special Oil & Gas Reservoirs

基　　金：国家自然科学基金“致密油藏注水诱发微裂缝机理及反演方法”(11872073);中国石油天然气集团有限公司、中国石油大学(北京)战略合作科技专项“鄂尔多斯盆地致密油-页岩油油藏工程方法及关键技术研究”(ZLZX2020-02-04-02)。

摘　　要：针对致密油藏注水吞吐效果变差的问题,运用油藏工程方法,综合考虑了地质特征、压裂工艺及注水吞吐制度,基于压裂液返排率和压裂增产倍数,定量表征致密储层天然裂缝与压裂裂缝形成的复杂缝网发育程度,得到了缝网发育系数计算方法。采用九标度法,建立评价指标权重集,进行模糊计算与类型识别。将研究成果应用于三塘湖盆地M区块注水吞吐效果评价,建立10项评价指标,将每项评价指标取值分为3类,确定了每类指标的取值界限。结果表明,I类井比例达到45.1%,与实际产量对比,准确率达86.21%。该研究可为致密油藏注水吞吐提供参考。In view of poor water-flood stimulation effect in tight reservoirs,the reservoir engineering method was applied,taking into account the geological characteristics,fracturing technologies and water-flood stimulation system,to quantitatively characterize the degree of development of the complex fracture network formed by natural and fractured fractures in tight reservoirs based on the fracture fluid flowback rate and fracturing stimulation multiplier,and to work out a method for calculating the fracture network development coefficient.The nine-scale method was used to establish weight set of evaluation indicators for fuzzy calculation and type identification.The study results were applied to the evaluation of water-flood stimulation effect in Block M,Santanghu Basin,10 evaluation indicators were established,and the value of each evaluation indicator were divided into three categories,and the value limit of each category were determined.The results showed that the proportion of Class I wells was 45.1%,and the accuracy rate was 86.21%compared with actual production.This study on development effect evaluation provides a reference for water-flood stimulation in tight reservoirs.

关 键 词：致密油藏 注水吞吐 评价方法 水平井 压裂液净入地量 有效注水率 油水置换率 

分 类 号：TE341[石油与天然气工程—油气田开发工程]