CAJ | 학술논문

肯尼斯油田是一个已经开发15年的带气顶、边水的层状构造砂岩油田,油田非均质严重,断层发育且油气水关系复杂,压裂增产难度大.根据油田地质油藏特点,对裂缝尺寸、施工排量、支撑剂种类、泵注程序等进行了优化:优选合理的裂缝尺寸避免沟通气、水层;采用树脂包砂陶粒减少地层吐砂的风险;优化施工砂比、应用端部脱砂等技术提高中高渗透层的导流能力,同时对压裂效果及其影响因素进行了系统分析,明确了地层能量和近井地带渗透率是影响压裂效果的最主要因素.自2005年以来,压裂获得了良好的单井增产效果,逐渐在新井投产、减缓老井递减、注水引效等方面发挥了越来越大的作用.
긍니사유전시일개이경개발15년적대기정、변수적층상구조사암유전,유전비균질엄중,단층발육차유기수관계복잡,압렬증산난도대.근거유전지질유장특점,대렬봉척촌、시공배량、지탱제충류、빙주정서등진행료우화:우선합리적렬봉척촌피면구통기、수층;채용수지포사도립감소지층토사적풍험;우화시공사비、응용단부탈사등기술제고중고삼투층적도류능력,동시대압렬효과급기영향인소진행료계통분석,명학료지층능량화근정지대삼투솔시영향압렬효과적최주요인소.자2005년이래,압렬획득료량호적단정증산효과,축점재신정투산、감완로정체감、주수인효등방면발휘료월래월대적작용.
Characterized by layered structural sand reservoir with gas top and edge water, Konys oilfield has been developed for more than 15 years. Fracturing stimulation is difficult due to non-homogeneous pay zone, developed fault and complex gas/water/oil relationship. According to the geological and reservoir features, some factors such as fracture geometry, operation capacity, proppant and operation procedure were optimized: reasonable fracture geometry to avoid communicating gas/water layer, RCP to avoid sanding after operation, optimized proppant concentration and tip screen-out fracturing to achieve higher flow conductivity in mid-high permeability zone. Fracturing result analysis has been done to find that reservoir energy and near wellbore permeability is main affecting factor. Since 2005, good performance has been achieved and fracturing technology has played a very important role on new well completion, slowing down old well decreasing and water injection effect.