摘要
在长期的水驱过程中,受层间储层物性差异的影响,多层合采油藏层间动用状况差异大,层间矛盾突出。分层注水技术是改善特高含水期层间矛盾的有效方法,其成功的关键是根据各小层的储层物性和动用状况确定各层的配水量。为此,以层间均衡动用为目标,综合考虑储层物性和动用状况,利用Buckley-Leverett非活塞式水驱油理论,建立了注水井分层配水量的计算方法,并编制了计算程序。分析结果表明:层间配水量的差异受油层厚度、剩余油饱和度和调控时间等因素的综合影响;所计算的配水量在给定的调控时间内使各小层达到均衡驱替状态,能够满足分层注水井层间配注的要求。
Affected by the differences of reservoir properties between layers, the interlayer producing situation and interlayer inconsistency of commingled reservoirs have large differences in the long-term process of water flooding. Separate-layer water injection technology is an effective method to ameliorate the contradictions among the high water cut stage layers. The key to the success of separate-layer water injection is to determine the distributional water injection rate according to the reservoir properties and development situations of each layer. This paper presents a method to calculate distributional water injection rate of each layer by use of the Buckley-Leverett displacement theory. This method takes into account of the reservoir physical properties and development situations. The aim of this method is to realize the interlayer equilibrium displacement. The results show that the differences of distributional water injection rate among layers is comprehensively affected by layer thickness, development status and regulatory time etc. And, the calculated distributional water injection rate in the regulatory time can make each layer achieve a balanced flooding state, and can meet the requirements of injection rate allocation of separate-layer water injection wells.
出处
《油气地质与采收率》
CAS
CSCD
北大核心
2012年第5期94-96,117,共3页
Petroleum Geology and Recovery Efficiency
基金
国家科技重大专项"断块油田特高含水期提高水驱采收率技术"(2011ZX05011-003)
关键词
多层油藏
层间矛盾
分层注水
计算模型
均衡驱替
multilayer reservoir
interlayer contradiction
separate-layer water injection
computation model
equilibrium displacement
