摘要
某油田油层薄,薄互层发育,水平井多且钻遇多个小层,其测井曲线油层标志层及内部旋回不明显。根据常规直井“旋回对比、分级控制、逐级闭合”油层对比方法进行水平井油层对比,其结果与开发动态存在矛盾。为此,根据井型采用不同方法将水平井测井曲线分段校直,直平结合初步确定水平井油层界线;同时结合地震、测井资料确定区域对比标志,以地震趋势为约束进行分层校正水平井油层界线,通过对比该油田93口水平井油层界线,明确了水平井砂岩段的层位归属,确定了水平井与直井连通关系;最后,应用示踪剂、生产数据等动态资料动静结合验证水平井油层界线的合理性。结果表明,该方法可有效提高水平井油层对比的准确性,为水平井井区开发调整提供地质依据。
In a certain oilfield, the oil layers are thin, the interbeds are well-developed, the horizontal wells are usually adopted and many sub-layers are penetrated, thus the oil layer marker and internal cycle are not obvious on the logging curve. The correlating method of the horizontal-well oil layer is established on the basis of the method of the conventional vertical wells'“cycle comparison, hierarchical control, step-by-step closure”, the obtained results have contradictions with those of the oilfield development performances. In order to solve this problem, according to the well type, different methods were adopted to align the horizontal-well logging curves by section, the vertical-horizontal well combination was conducted to preliminarily mark out the boundary line of the oil layer in the horizontal well;at the same time, integrated with the seismic and log data, the regional correlating marker was determined, the boundary line was aligned layer by layer with the constraint of seismic trend. With the help of the correlations among 93 horizontal wells' boundary lines, the sandstone sections of the horizontal wells were confirmed, therefore the connectivity between the horizontal and vertical wells was ensured;finally by means of the dynamic data such as the tracer, production data and so forth, the rationality of the boundary line was verified for the horizontal wells with the help of the static and dynamic integration. The results show that the method can effectively improve the accuracy of the oil reservoir correlation for the horizontal well, thus the geological evidence can be provided for the horizontal-well-block development adjustment.
作者
魏淑燕
WEI Shuyan(No.8 Oil Production Plant of Daqing Oilfield Co Ltd.,Daqing 163514,China)
出处
《大庆石油地质与开发》
CAS
CSCD
北大核心
2019年第3期80-86,共7页
Petroleum Geology & Oilfield Development in Daqing
基金
国家科技重大专项“特低渗复杂油藏规模有效动用关键技术”(2017NX05013006)
关键词
水平井
油层对比
直平结合
薄油层
horizontal well
oil reservoir correlation
vertical-horizontal well combination
thin oil layer/reservoir
