受复杂构造控制的河流相地层对比技术及应用

Correlation Technique and Application of Fluvial Strata Controlled by Complex Structure

摘要: 在运用传统河流相地层对比技术如“等高程对比法”对P油田复杂构造区进行地层对比研究过程中，存在断点难以识别及部分地层厚度异常变化的问题。为此，在传统河流相地层对比方法的基础上，通过分析研究区复杂构造发育特点，结合构造演化成因分析，综合运用测井、地震、动态资料，总结了3套针对研究区复杂构造带的地层对比技术：“高倾角地层斜井对比技术”、“气云区走滑断裂带地层对比技术”以及“基于区域同沉积作用研究的地层对比技术”。3种地层对比技术弥补了传统技术在复杂构造区对比中的不足，完善了全区闭合统层方案，在断层的展布及区域同沉积作用特征方面取得了新的认识，继而在P油田低效井治理及储量挖潜的工作中得到了较好的应用。

Abstract: In the process of stratigraphic correlation study of complex structural areas in P Oilfield by using traditional fluvial facies stratigraphic correlation technologies such as “equal elevation correlation method”, there existed the problems of difficulty to identify fault points and abnormal variation of formation thickness. Therefore, on the basis of traditional fluvial stratigraphic correlation, through the analysis of the development characteristics of complex structures and combined with the analysis of structural evolution and genesis, the well logging ,seismic and dynamic data were comprehensively used to sum up 3 sets of stratigraphic correlation technologies of complex structural zones in the studied area: such as “inclined well correlation technology in high dip formation”, stratigraphic correlation technique of strike-slip fault zone in gas-cloud area and stratigraphic correlation techniques based on the study of regional synsedimentary processes. These three kinds of stratigraphic correlation techniques make up for the shortcomings of traditional techniques in the correlation of complex structural areas, perfect the closed reservoir scheme of the whole area, and obtain a new understanding in the distribution of faults and the characteristics of regional synsedimentary processes. It has been well applied in controlling the low efficiency oilfields and tapping the potential of reserves in P Oilfield.