MDT测井技术在川东北地区多井解释中的应用
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摘要
在高度非均质的碳酸盐岩地层中,常规测井资料无法解释的一些疑难问题(如常规测井资料无法确定储层纵横向上的连通性、气水界面判断不准、疑难层的流体性质判断不清等)可以通过电缆试地层测试资料的应用得以解决,并见到了较好的地质效果。MDT(模块式地层测试)测井新技术能够及时、快捷、准确地获取储层流体、压力资料,把许多需要在试油及勘探评价阶段才能解决的问题通过MDT测试就得以了解、认识,从而有效地减少试油工程的投入,也为气藏的储量计算提供了较准确的参数。用MDT测试的压力资料结合常规测井资料,以及区域地质、地震、试油的地层压力资料,对川东北罗家寨、磙子坪、铁山坡等气田进行多井压力分析,较好地解释了各个气藏及气水之间的关系,准确地确定了气藏的气水界面,为储量计算提供了依据。
Some difficult problems in highly heterogeneous carbonate reservoirs that are unsolvable through conventional logging, such as the determination of vertical and lateral reservoir connectivity, inaccurate definition of oil-water contact and unclear identification of fluid properties of unclear layers, can be solved through application of wireline drillstem test data, and good geologic effects have been achieved. Modular drillstem test (MDT) technology can timely, rapidly, and accurately obtain reservoir fluid and pressure and solve many problems that formerly need to be solved through formation test and exploratory appraisement, thus the engineering cost of formation test can be effectively lowered and accurate parameters can be provided for estimation of gas reserves. In combination with conventional logging, regional geologic, seismic and formation test data, pressure data from MDT are used to perform multiwell pressure analysis in Luojiazhai, Gunziping, and Tieshanpo gas fields in the northeastern Sichuan Basin. These gas reservoirs and their gas-water relations are well interpreted, and their gas-water contacts are accurately defined, and a solid foundation is provided for reserves calculation.
Some difficult problems in highly heterogeneous carbonate reservoirs that are unsolvable through conventional logging, such as the determination of vertical and lateral reservoir connectivity, inaccurate definition of oil-water contact and unclear identification of fluid properties of unclear layers, can be solved through application of wireline drillstem test data, and good geologic effects have been achieved. Modular drillstem test (MDT) technology can timely, rapidly, and accurately obtain reservoir fluid and pressure and solve many problems that formerly need to be solved through formation test and exploratory appraisement, thus the engineering cost of formation test can be effectively lowered and accurate parameters can be provided for estimation of gas reserves. In combination with conventional logging, regional geologic, seismic and formation test data, pressure data from MDT are used to perform multiwell pressure analysis in Luojiazhai, Gunziping, and Tieshanpo gas fields in the northeastern Sichuan Basin. These gas reservoirs and their gas-water relations are well interpreted, and their gas-water contacts are accurately defined, and a solid foundation is provided for reserves calculation.
引文
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