Technology Research On Improving Gao 3 Block's Heavy Oil Reservoir Development Effect In Steam Stimulation Later Stage

Steam stimulation is the main type to exploit heavy oil reservoir and its own defects lead to a series of problems with the exploitation continuing especially in. Gao3 block is the main block of Gaosheng oil field of Liaohe oil region to produce heavy oil by thermal recovery method, presently it has been in the later stage, and the effect of steam stimulation is getting worse. Therefore, this study intends to use Gao3 block as research target,not only to search out both development status and sequential development potentiality by prediction and evaluation of soakage main development index and reasonable development limitation study of steam huff and puff, but also to analyse the elements which affect the development effect in multipled huff and puff later stage of Gao3 block and its influence rules. On the basis of them, both data mining theories and means and numerical reservoir simulation software are used to do the sensitivity analysis and optimization for steam huff and puff injection-production technological parameters of Gao3 block, and numerical reservoir simulation software is used to do analysis for injection-production technology such as multi-well cyclic steam stimulation (or multiwell synchronous steam huff and puff), one gas injection and more exploitation, intermittent cyclic steam stimulation, steam+chemical agent and regulating separate stratum injection steam(with optimized parameters can be obtained by temporary blocking profile control or mechanical separate injection), in order to research the development effect enhanced by them in the steam stimulation later stage of Gao3 block. The result indicates that present stage of Gao3 block is in the steam stimulation later stage, the formation energy has been almost used up, the entire degree of reserve recovery is high, but Gao3 block also has development potentiality, the effect of steam stimulation can be improved by confirming optimum injection-production parameters or choosing reasonable development ways. The research resolves the development problems which exist in steam stimulation later stage of Gaosheng oil field, improves the effect of steam stimulation, and offers instructions for the application of in-place technology. At the same time, the clue and results of research are hoped to use for reference for the development of similar oil fields.