摘要
壁心对储层评价至关重要.渤海油田中生界、古生界及太古界地层,一般使用旋转井壁取心进行作业.在实际的旋转井壁取心作业过程中,因地层的岩性、均质性、抗压强度等不同,导致旋转取心的收获率及作业效率呈现出较大的差异.同一井眼内存在沉积岩、变质岩和火成岩的条件下,传统的按照壁心设计点的顺序逐一取心的方式往往收获率低下且极易"堵心".通过对岩石岩性、抗压强度和均质性的评估,选取合适的旋转取心仪器,制定合理的取心作业方案,提高旋转井壁取心的收获率和作业效率,对后期的旋转井壁取心作业具有重要的指导和借鉴意义.
Abstract
The core is crucial for reservoir evaluation.Generally speaking,in the Bohai Oilfield,the rotary sidewall coring is used for the Paleogene,Mesozoic,Paleozoic,and Archean strata.In the actual process of rotary sidewall coring,there are significant differences in the yield and efficiency of rotary coring due to differences in lithology,homogeneity,compressive strength,and other factors of the formation.Under the conditions of sedimentary,metamorphic,and igneous rocks in the same wellbore,the traditional mechanical coring method based on the order of wall core design points often has low yield and is prone to"plugging".This article evaluates the rock lithology,compressive strength,and homogeneity,selects suitable rotary coring instruments,formulates a reasonable coring operation plan,improves the yield and efficiency of rotary sidewall coring,and has important guidance and reference significance for later rotary sidewall coring operations.
维普
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