碳酸盐岩气藏储层外部能量评价新方法  

NEW EVALUATING METHOD FOR THE EXTERIOR ENERGY OF CARBONATE GAS RESERVIORS

作　　者：刘道杰 田中敬 LI Jianli 王方鲁 谢伟彪 

机构地区：[1]中石油冀东油田分公司勘探开发研究院,河北唐山063004 [2]Faculty of Engineering and Applied Science,University of Regina

出　　处：《大庆石油地质与开发》2013年第5期67-71,共5页Petroleum Geology & Oilfield Development in Daqing

基　　金：国家自然科学基金项目(50874094)资助

摘　　要：储层外部能量的准确评价是认识气藏的基础,特别是对于构造特征复杂的碳酸盐岩气藏,气藏储层外部能量的评价显得尤为重要。将气藏非储层(泥页岩隔层或盖层)和有限封闭水体看作一个整体作为气藏储层外部能量,在广义气藏物质平衡原理和储层精细描述理论的基础上,考虑气藏基质孔隙、裂缝和溶洞,建立了碳酸盐岩气藏储层外部能量评价新方程。此方法利用气藏实际生产数据和气藏基础数据,采用二元回归分析法求解,不仅可以确定气藏外部能量的大小,也可以确定气藏地质储量。实例证明,利用碳酸盐岩气藏储层外部能量评价新方法获得的气藏储层外部能量大小与数值模拟方法计算的结果十分接近,获得气藏地质储量与容积法也基本相同,从而论证了新方法的实用性和有效性。Accurate evaluation of the energy outside the gas reservoir is the basis for the understandings of the res- ervoir, especially for the carbonate gas reservoirs with complex structural features, their corresponding evaluation is of great importance. The non-reservoir including mud shale interlayer or cap rocks in the gas reservoirs and limited enclosed aquifer are regarded as a whole of the exterior energy of the reservoirs. Based on the generalized gas-reser- voir material balance principle and fine characterizing theory of the reservoir, a new evaluating equation for the ex- terior energy of carbonate gas reservoirs is established by considering the matrix pores, fractures and caverns. With the help of the practical production and basic data of the gas reservoirs, the solution of the new evaluation equation is sought by means of dual regression analysis, the method can not only determine the exterior energy size of the gas reservoirs, but also can fix the original gas in-place. The case history proves that the exterior energy size calculated by the new evaluating method for the reservoirs is very close to the computed result by the numerical simulation method. Besides, the original gas in-place gained by the new method is generally the same as that by means of the volume method, thus the practicability and effectiveness of the new method are discussed and proved.

关 键 词：碳酸盐岩气藏 储层外部能量 物质平衡方程 非储层 有限水体 评价 

分 类 号：TE355[石油与天然气工程—油气田开发工程]