岔河集油田水下分流河道砂体特征及对开发的影响  

Sand body characteristic and effects on exploitation of subaqueous distributary channel in Chaheji oilfield

作　　者：杨满平[1] 张凌峰[1] 王玉忠[2] 刘月萍[2] 吴海红[2] YANG Manping;ZHANG Lingfeng;WANG Yuzhong;LIU Yueping;WU Haihong(Petroleum Engineering Department of Yanshan University,Qinhuangdao,Hebei 066004,China;Geological Institute of No.2 Oil Production Plant of Hiiabei Oilfield Co.Ltd.,Bazhou 065034,China)

机构地区：[1]燕山大学石油工程系,河北秦皇岛066004 [2]华北油田第二采油厂地质研究所,河北霸州065700

出　　处：《河北工程大学学报（自然科学版）》2018年第1期94-98,108,共6页Journal of Hebei University of Engineering:Natural Science Edition

基　　金：国家自然科学基金资助项目(E0403-50804041)

摘　　要：通过对岔河集水下分流河道砂体的特征以及对开发的影响进行详细的分析和研究,根据钻遇砂体统计,岔河集油田水下分流河道砂体表现为纵向厚度小,河道宽度窄的特点,单砂体厚度集中分布在1~5 m之间,河道宽度普遍小于100 m。加密钻井能新增钻遇砂体和油砂体,砂体和油砂体的连通率也有所增加;但即使井距加密到100 m左右后,井网对砂体的控制程度仍然较低。大部分油砂体难以形成注采关系,表现为有采无注或有注无采;有注采关系的油砂体也以两点法和三点法注采系统为主,难以形成完善的注采井网系统。油井和水井的多向见效关系主要是由于合层开发造成的假象。由砂体特征影响而形成的剩余油类型主要为:现有井网没有控制的透镜状油砂体,有采无注弹性开发形成的剩余油,和水驱单向受效形成的剩余油等。Detailed analysis and research on the characteristics of Chaheji river catchment distributary channel sand body and its effect on development are carried out.According to statistics of sand bodies by drilling,the subaqueous distributary channel sand body of Chaheji oilfield has small vertical thickness and narrow width.The thickness of single sand body distributes betw een 1-5 m eters,and the river width is generally less than 100 meters.Sand body and oil sand body can be added by infill drilling,and connectivity of sand body and oil sand body is also increased.However,even well spacing reduces to 100 m eters,the degree of control pattern to the sand body is still low.M ost of the oil sand bodies are difficult toform the injection production relation,appearing the phenom ena like production and no injection o r injection and no production.The injection-production relationships of oil sand body m ainly are two point and three point of injection production system.It is difficult toform a perfect injection-production well pattern system.The multiple direction effect relationship between oil wells and water wells is illusion,mainly due to the development of composite layer.Affected by the sand body characteristics,the types of remaining oil include mainly lenticular oil sand body with no control of the existing well pattern,remaining oil of production with no injection by elastic development,remaining oil by one-way water flooding etc.

关 键 词：浅水三角洲 水下分流河道 砂体 油砂体 注采系统 剩余油 

分 类 号：TE35[石油与天然气工程—油气田开发工程]