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Performance Analysis Of Different Formation Testing Technologies In Complex Carbonate Reservoirs Of West Kazakhstan

机译：西哈萨克斯坦复杂碳酸盐储层中不同形成测试技术的性能分析

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Objectives & Scope: The case study presents an application and comparison of different wireline formation testing technology to acquire vital pressure data and downhole fluid samples in tight sub-milidarcy heterogeneous carbonate fields. Examples from Kazakhstan, where tools with different configuration of fluid intake positions and shapes, various flowing areas, are presented to allow us to compare and contrast the performance of each in more complex and challenging reservoir conditions. Methods, Procedures, Process: First part of the study discusses the comparison between inflatable straddle packer and radial probe in terms of their data quality and efficiency of the acquisition, where both of the tools were deployed to measure formation pressure, conduct downhole fluid analysis and acquire downhole fluid samples. While the second part focuses on comparison between single probe and radial probe, where both of them were deployed in the well together and were intended to get formation pressure measurements in the zones with the lowest porosity. Results, Observations, Conclusions: Extreme downhole conditions pose a challenge to formation testing, acquisition of accurate reservoir pressure data and representative formation samples have proved difficult in cases of highly heterogeneous low porosity and low permeability reservoirs. In the first part of the study, the performance of the each tool compared with different observations such as: average time to first hydrocarbon, average volume to first hydrocarbon, water fraction content, and sampling and downhole fluid analysis by formation zones and by mobility ranges. In the second part, the study elaborates on pressure survey conducted in tight highly heterogeneous carbonate reservoir, where tool with large flowing area and circumferential flow shows its superiority, thus improving operator's reservoir evaluation. Downhole positions of both tools against formation features, such as vugs, porous spots and anhydrite inclusions, were reconstructed on microimager log. Novel/Additive information: This case study describes and compares the approaches and methodologies to acquire and perform complex interpretation of critical formation pressure data in heterogeneous carbonate reservoir. The learnings from this successful acquisition and interpretation can substantially improve the reservoir characterization of similar fields worldwide.
机译：目标和范围：案例研究介绍了不同有线形成测试技术的应用和比较，以在紧密亚微米型异质碳酸盐田中获取重要压力数据和井下液体样品。哈萨克斯坦的示例，其中提出了具有不同配置的工具，具有不同的流体进气位和形状，各种流动区域，以允许我们比较和对比每个在更复杂和具有挑战性的储层条件下的性能。方法，程序，过程：研究的第一部分讨论了可充气跨跨封装器和径向探针在其数据质量和采集效率方面的比较，其中展开了两种工具以测量形成压力，导通井下流体分析和获得井下液体样品。虽然第二部分侧重于单个探针和径向探针之间的比较，其中两个都在一起展开，旨在在具有最低孔隙率的区域中形成压力测量。结果，观察结论：极端井下条件对形成测试构成挑战，在高度异质低孔隙率和低渗透储层的情况下，难以获得准确的储层压力数据和代表性地层样品的挑战。在研究的第一部分中，每个工具的性能与不同观察结果相比，例如：第一个烃的平均时间，第一烃，水分含量和采样和井下流体分析通过形成区域和通过移动性范围。在第二部分中，该研究详细说明了在紧的高度异质碳酸盐储层中进行的压力测量，其中具有大流动区域和周向流动的工具显示其优越性，从而改善了操作员的储层评估。在MicroImager Log上重建了两种工具的井下位置，例如Vugs，多孔斑点和空中斑点夹杂物。新颖/添加剂信息：本案例研究描述并比较了在异构碳酸盐储层中获取和执行复杂的临界地层压力数据的复杂解释方法和方法。从这个成功的收购和解释中的学习可以大大提高全球类似领域的储层特征。

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