CAJ | 학술논문

舍女寺油田孔二段油藏空气渗透率26.7×10-3 μm2,开发过程中存在储层物性差、注水困难、注采井网不完善、油藏低速低效开采等问题.为此,开展了孔二段低渗油藏改善开发效果的4项研究,即提高水驱控制程度、合理驱动压力梯度、小井距加密提高连通程度和非主流线井压裂.实施后舍女寺油田孔二段油藏采油速度从0.81%上升到0.92%,最终采收率从14.8%提高到26.1%,增加可采储量38×104 t,为同类型油藏提供了改善开发效果的技术对策.
사녀사유전공이단유장공기삼투솔26.7×10-3 μm2,개발과정중존재저층물성차、주수곤난、주채정망불완선、유장저속저효개채등문제.위차,개전료공이단저삼유장개선개발효과적4항연구,즉제고수구공제정도、합리구동압력제도、소정거가밀제고련통정도화비주류선정압렬.실시후사녀사유전공이단유장채유속도종0.81%상승도0.92%,최종채수솔종14.8%제고도26.1%,증가가채저량38×104 t,위동류형유장제공료개선개발효과적기술대책.
In the low permeability reservoir,there exist higher pressure in water injecting,poor injecting and discovery well-pattern,low speed and low effective in the development of Member 2 of Kongdian Formation in Shenvsi Oilfield.In order to solve these problems,four suggestions are proposed to improve the development in the low permeability oil reservoir, such as improving the degree of water flooding, optimizing technique of the reasonable driving pressure gradient, infilling well spacing and increasing the interconnected scale, reservoir fracturing for wells in the non-mainstream.After testing,the recovery rate enhances from 0.81% to 0.92%,and eventually recovery efficiency will be 14.8% to 26.18%,the increasing recoverable reserve will be 38×104 t.It provides a series of methods in improving similar reservoirs with low permeability.