StethoScope随钻测压技术在渤海JZS油田的应用

Application of StethoScope formation pressure test while drilling in JZS oilfield of Bohai Sea

渤海JZS油田主力含油层系为沙二段辫状河三角洲前缘砂泥岩薄互层,由于砂层薄且相变快,地震资料难以分辨,储层连通及动用情况不明,严重制约了油田后续开发。为了解区块储层连通关系,优化井网部署,首次采用StethoScope随钻测压技术进行了地层压力测试。全面介绍了StethoScope随钻测压工具的测压原理、应用流程、测压模式及其在渤海JZS油田优化注采中的应用。测试结果明确了地层动用亏空情况和储层连通关系,为油田后期开发提供了重要依据,同时对StethoScope随钻测压技术在其他区域的推广应用具有一定的借鉴和指导意义。

The main oil-bearing series of JZS oilfield is the thin sand-shale interbedded layers at the delta front of braided river in the second Member of Shahejie Formation. As the sand layers are thin and phase change is fast, it is hard to identify from seismic data, and the reservoir connectivity and production situation are not clear, which seriously restricts the further development of the oilfield. In order to understand the block reservoir connectivity and optimize the well pattern arrangement, the formation pressure test, for the first time, introduced StethoScope formation pressure test while drilling. This paper comprehensively introduces the pressure testing principle, application process, pressure testing mode of StethoScope formation pressure test while drilling tool, and its application in injection-production optimization of JZS oilfield in Bohai Sea. The test results clarify the formation production, voidage and reservoir connectivity, which provides an important basis for the later development of the oilfield, and has a certain reference and guidance to the popularization of StethoScope formation pressure test while drilling in other areas.