CAJ | 학술논문

套管内钻孔深穿透径向井技术利用高压水力射流在油层部位形成多个辐射状径向井眼,以扩大泄油面积和降低生产压降.分析了该技术的技术原理,根据技术适用性对试验井进行选井选层论证,在此基础上提出了两口试验井的径向孔设计方案,并从试验准备及施工工艺方面论述了两口井的现场实施情况.试验结果表明,两口井均达到了方案设计要求,并取得了一定的增产效果,但未达到预期产能,分析认为是径向喷射过程中岩屑返排困难形成砂堵所致.
투관내찬공심천투경향정기술이용고압수력사류재유층부위형성다개복사상경향정안,이확대설유면적화강저생산압강.분석료해기술적기술원리,근거기술괄용성대시험정진행선정선층론증,재차기출상제출료량구시험정적경향공설계방안,병종시험준비급시공공예방면논술료량구정적현장실시정황.시험결과표명,량구정균체도료방안설계요구,병취득료일정적증산효과,단미체도예기산능,분석인위시경향분사과정중암설반배곤난형성사도소치.
The mechanism of deep penetration of radial well with hole-drilling in casing technology developed in recent years is to form a plurality of radial hole in reservoir through high pressure water jetting, which could enlarge the drainage area and reduce production?pressure?drop.?This?paper?analyzes?the?technical?principles?of?this?technology,?and?then?proves?the?mechanism?with?well?and?layer?selection?of?test?wells?through?technical?applicability.?On?the?basis?of?these,?the?radial?hole?design?plan?of?two?testing?wells?were?proposed,?and?the?on-site?operation?situation?was?illuminated?from?the?aspect?of?field?test?preparation?and?construction?techniques.?The?testing results showed that both wells site construction had met the requirement of the design and made the yield increasing effect at some?certain?degree,?even?though?failed?to?achieve?the?anticipated?capacity.?It?is?thought?that?the?sand?blocking?resulted?from?debris?flow-back?difficulties?is?the?key?reason?for?increase?of?output?not?enough?during?the?radial?water?jetting?process.