论文部分内容阅读
柴达木盆地南八仙油气田N22—N1油气藏储层分布不稳定,横向上岩性变化大,进行地层对比和细分层工作存在着很大的困难;油气藏无统一的油气水界面和统一的压力系统,油气性质及油气比也存在较大差异,用常规的处理手段和处理程序无法计算和预测储层的产油气比例,导致解释结果符合率低。为此,采用CONGAS凝析油气藏解释评价软件,根据三孔隙测井曲线对天然气的响应特征,通过计算三孔隙测井响应方程,计算出地面条件下的气油比和可动油气密度等参数,将计算的油气饱和度与气油比进行交绘,形成综合测井解释图版。通过对该图版的综合分析,结合储层物性,得到N22—N1油气藏储层油、气、水层的综合定量区分解释标准。应用该标准的综合解释符合率达到94.8%。
The N22-N1 reservoirs in the Nanbaixian Oil and Gas Field in the Qaidam Basin are not stable in reservoir distribution, with large changes in lithology in the lateral direction. Therefore, it is very difficult to conduct stratigraphic correlation and fine stratification. There is no uniform interface between oil, The pressure system, the nature of oil and gas, and the ratio of oil to gas are also quite different. It is impossible to calculate and predict the ratio of oil and gas produced by the reservoir by conventional treatment methods and procedures, resulting in the low coincidence interpretation result. Therefore, by using CONGAS condensate reservoir interpretation and evaluation software, according to the response characteristics of the three-well logging curve to natural gas, parameters of gas-oil ratio and movable hydrocarbon density under the ground conditions are calculated by calculating the three-well logging response equation , The calculated oil and gas saturation and gas-oil ratio for cross-mapping, the formation of a comprehensive log interpretation plate. Through the comprehensive analysis of the plate, combined with the reservoir physical properties, the oil and gas, water layer of N22-N1 reservoir quantitative comprehensive interpretation of the criteria. Application of the standard comprehensive interpretation of the compliance rate of 94.8%.