Research and Application of Cementing Technology for the Second Horizon-tal Well in Block Su 19 of Sulige Gas Field
The geological structure of Su19 block in Sulige gas field is complex,which is discontinuous,faulted and distributed in multiple sets of production layers.The formation pressure of Liujiagou strata is low,which is easy to leak and collapse,and the ce-menting quality of the target layer of the second horizontal well is low,which is mainly manifested in the casing deviation to the down-hole wall,the poor moderate placement,and the difficulty in cleaning the cuttings in the horizontal section.According to a series of problems,in order to ensure two horizontal well cementing quality,by conducting slurry system optimization,optimization and evalua-tion of prerequisite system and the casing centralizer optimization,optimization of drilling fluid performance,etc.,a series of optimiza-tion schemes were formed,such as improving cementing technology measures,improving circulating well cleaning quality,controlling cement slurry loss,preventing water channeling of cement slurry annulus,optimizing and accurately positioning the centralizer,etc.After field test and optimization improvement,the cementing technology of the second horizontal well in Su 19 block has been formed with practical value.
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