CAJ | 학술논문

受到注采井网和压裂工艺双重限制,单纯增加缝长来提高超低渗透油藏产量效果已不明显,为此提出了定向射孔多缝压裂技术思路,通过定向射孔诱导定向起裂,迫使初始裂缝转向,最终形成相互独立的多缝,进一步提高油层横向动用程度,扩大泄油面积.通过物模研究.认识到射孔方位和水平应力差是影响多缝形成的关键因素,在此认识上,优化了压裂工艺.华庆地区现场试验2 口井,通过净压力拟合和微地震裂缝监测等手段分析,初步证实层内形成了独立多缝.投产初期,试验井相比邻井井均日增油0.91 t(增幅约26%),实践证明通过多缝压裂提高泄油面积可以达到增产的目的.
수도주채정망화압렬공예쌍중한제,단순증가봉장래제고초저삼투유장산량효과이불명현,위차제출료정향사공다봉압렬기술사로,통과정향사공유도정향기렬,박사초시렬봉전향,최종형성상호독립적다봉,진일보제고유층횡향동용정도,확대설유면적.통과물모연구.인식도사공방위화수평응력차시영향다봉형성적관건인소,재차인식상,우화료압렬공예.화경지구현장시험2 구정,통과정압력의합화미지진렬봉감측등수단분석,초보증실층내형성료독립다봉.투산초기,시험정상비린정정균일증유0.91 t(증폭약26%),실천증명통과다봉압렬제고설유면적가이체도증산적목적.
Due to the restriction of flooding patterns and fracturing technologies, it is not distinct to increase the output of super-low permeability reservoir in Changqing Oilfield only by increasing fracture length. Enlightened by the fact that the directional perforating can reduce the pressure of rock fracturing, the new technology of directional perforating and multi-fracture fracturing is firstly brought forward. This technology improves horizontal productive degree of oil layer and enlarges the drainage area through directionally per-forating to induce oriented extension, forcing initial fracturing to change, and finally forming independent multi-fracturing. Through the study of entity model, it is recognized that perforating azimuth and horizontal stress difference are the key factors that affect the formation of multi fractures. Based on this recognition, fracturing technology is optimized. Two wells were tested on the spot in Huaqing area. It is approved initially that independent multi fractures is formed inside layers through the analysis on net pressure matching and microseismic frac mapping. At the initial production stage, the average daily oil production of trial wells increases by 0.91 tons (growing rate is about 26%) compared with the adjacent wells. This practice proves that production can be increased by increasing drainage area through multi-fracture fracturing.