Z油田曲流带复合砂体精细刻画及其应用研究  

Study on fine characterization and application of composite sand body in meander zone of Z Oilfield

作　　者：吴盼 胡硕[1] 沈忠山[1] 付斌[1] 梁晓江 张媛媛[1] WU Pan;HU Shuo;SHEN Zhongshan;FU Bin;LIANG Xiaojiang;ZHANG Yuanyuan(The Fourth Production Plant of Daqing Oilfield Co.,Ltd.,Heilongjiang Daqing 163511,China)

机构地区：[1]大庆油田有限责任公司第四采油厂,黑龙江大庆163511

出　　处：《非常规油气》2023年第2期18-25,共8页Unconventional Oil & Gas

基　　金：国家科技重大专项“二类油层化学驱技术研究与规模应用——杏七区东部平直联合三元复合驱开发扩大性现场试验”(110017333006052)。

摘　　要：为了探索水平井与直井联合开发提高采收率技术,针对Z油田平直联合试验区注采井间连通差异较大的问题,综合采用直井及水平井测井信息开展复合砂体精细解剖,并指导不同类型砂体开发调整。结果表明:1)废弃河道细化为轻度、中度、高度和完全废弃4种类型。2)利用水平井声波及伽马曲线值可确定水平段夹层个数及部位,辅助确定砂体类型和规模;利用砂体厚度及高程差异识别单一点坝。3)轻度废弃河道井组单井连通率为81.8%,连通性最好;中度废弃河道单井连通率为66.7%,连通性中等;高度废弃河道单井连通率为25.0%,连通性最差。中轻度及中度废弃河道在开发时调整为采用调剖的方式,高度废弃河道的开发调整为采用压裂的方式;点坝侧积夹层发育的井区,垂夹层方向采用压裂的方式,顺夹层方向先高浓再低浓的方式调整。该研究成果对复合厚砂体化学驱挖潜具有重要的指导意义。In order to explore the combined development and enhanced oil recovery technology of horizontal wells and vertical wells, in view of the large connectivity difference between injection and production wells in the horizontal combined test area of Z Oilfield, the logging information of vertical wells and horizontal wells was comprehensively used to carry out fine anatomy of composite sand bodies, and guide the development and adjustment of different types of sand bodies. The results show that: 1)The abandoned channel is refined into four types of mild, moderate, high and complete abandonment. 2)The number and location of interlayers in the horizontal section can be determined by using the sonic wave and gamma curve values of horizontal wells to assist in determining the type and scale of sand bodies. The single point bar can be identified by the thickness and elevation difference of the sand body.3)The best connectivity is the slightly abandoned channels which the single well connectivity rate of the slightly abandoned channel well group is 81.8%;The single well connectivity rate of the moderately abandoned channel is 66.7%, and the connectivity is medium;The connectivity rate of a single well in a highly abandoned channel is 25.0%, with the worst connectivity.The development and adjustment of moderately lightor moderately abandoned channels adopts the method of profile control, and the highly abandoned channels adopt the method of fracturing. In the well area where the lateral accretion interlayer of the point bar is developed, the method of fracturing is adopted in the vertical direction of the interlayer, and adjustment method is adopted along the direction of the interlayer. The research results have important guiding significance for chemical flooding of composite thick sand bodies.

关 键 词：复合砂体 废弃河道 复合点坝 水平井 侧积夹层 连通程度 

分 类 号：TE122.2[石油与天然气工程—油气勘探]