复杂逆断块油藏地质建模及其数值模拟网格粗化的一种解决方案——以英东一号油藏为例

摘要/Abstract

摘要： 复杂逆断块储层油藏地质建模一直是最麻烦的建模工作之一，难题在于同一储层在一口直井中多次重复出现。按照常规的油藏地质建模方法，由于无法表征逆断块叠置部分重复出现的地层构造和储层物性特征，导致模型失真和储量损失，无法建成一个精确可靠的油藏地质模型；粗化后的预测模型也存在因地层缺失、储量变小而不能反映油藏的真实情况。为解决上述技术难题，研发了以^“多边界技术^”、^“断层隔挡技术^”以及^“全覆盖油藏叠合面积的矩形形式角点网格系统^”数值模拟网格粗化等技术为核心的技术系列，组合形成一种高效解决复杂逆断块建模中的构造建模和数值模拟网格粗化等难题的方案。这种解决方案利用地震构造解释成果、沉积相、地层对比、井资料等，为英东一号复杂逆断块油藏的开发方案建立了精确的油藏地质模型和用于油藏数值模拟的动态预测模型。通过方案实施追踪证实，开发方案预测的生产指标和两年来的实际生产情况的吻合率在95% 以上。

关键词: 逆断块；油藏地质建模；多边界技术；断层隔挡技术；油藏数值模拟

Abstract: A same reservoir may be repeatedly drilled in a vertical well in complex reverse fault-block reservoirs, making the geological modeling of these reservoirs one of the most troublesome modeling activities. Conventional reservoir geological modeling is incapable of characterizing the superimposed structures and reservoirs in reverse fault-block reservoirs, which will lead to an imprecise and unreliable reservoir geological model with distortion and reserve loss. Actual reservoir cannot be characterized by upscaled model due to formation and reserve losses. Accordingly, a series of technologies are developed to solve this technical problem, which principally include multiboundary technology, fault-isolation technology, rectangular corner-point grid system with full coverage of superimposed reservoir area and other reservoir numerical simulation upscaling technologies. An efficient solution is established to complete structure modeling and numerical simulation upscaling and other problems in the geological modeling of complex reverse fault-block reservoirs. Seismic structure interpretation, sedimentary facies, strata correlation, well and other data are comprehensively used in this solution to establish an precision Yingdong-1 reservoir geological model and the performance forecast model that is used to perform reservoir numerical simulation. Practical applications indicate that the matching rate between forecast production and 2-year actual production exceeds 95%.

Key words: reverse fault-block, reservoir geological modeling, multi-boundary technology, fault-isolation technology, reservoir numerical simulation

任殿星　周久宁　田昌炳　李保柱　许磊　秦勇　侯博刚　严耀祖　李兴彦. 复杂逆断块油藏地质建模及其数值模拟网格粗化的一种解决方案——以英东一号油藏为例[J]. 中国石油勘探, 2015, 20(6): 29-38.

Ren Dianxing, Zhou Jiuning, Tian Changbing, Li Baozhu, Xu Lei, Qin Yong, Hou Bogang, Yan Yaozu, Li Xingyan. A Solution to Geological Modeling and Numerical Simulation Upscaling in Complex Reverse Fault-Block Reservoirs: A Case Study of Yingdong-1 Reservoir[J]. China Petroleum Exploration, 2015, 20(6): 29-38.

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