CAJ | 학술논문

大港油田低渗透难动用储量和非常规油气藏储量丰富,水平井分段压裂完井技术是经济、有效开发低渗透油藏、非常规油气藏的主要手段.为探索水平井分段压裂完井工艺的适应性,大港油田开展了裸眼封隔器分段压裂完井、套管固井滑套分段压裂完井、不动管柱水力喷砂射孔完井工艺试验应用,并形成了以套管固井+滑套分段压裂为主体的分段压裂完井工艺.该工艺具有固完井分段压裂一体化管柱、全通径、压裂作业连续等优点,能够缩短作业周期,后期出水层段可以关闭滑套进行堵水,但也存在投球易导致井筒生产堵塞、胶塞不碰压无法保证固井质量、与相邻井串通等问题,针对存在问题开展了分析评价,并提出解决对策,现场实施后基本实现了油井的正产生产,为此类分段压裂完井方式的下步规模应用奠定了基础.
대항유전저삼투난동용저량화비상규유기장저량봉부,수평정분단압렬완정기술시경제、유효개발저삼투유장、비상규유기장적주요수단.위탐색수평정분단압렬완정공예적괄응성,대항유전개전료라안봉격기분단압렬완정、투관고정활투분단압렬완정、불동관주수력분사사공완정공예시험응용,병형성료이투관고정+활투분단압렬위주체적분단압렬완정공예.해공예구유고완정분단압렬일체화관주、전통경、압렬작업련속등우점,능구축단작업주기,후기출수층단가이관폐활투진행도수,단야존재투구역도치정통생산도새、효새불팽압무법보증고정질량、여상린정천통등문제,침대존재문제개전료분석평개,병제출해결대책,현장실시후기본실현료유정적정산생산,위차류분단압렬완정방식적하보규모응용전정료기출.
The?low?permeability?difficult-to-produce?reserves?and?unconventional?oil?and?gas?reserve?in?Dagang?oilfield?is?rich,?and?horizontal?wells?with?staged?fracturing?completion?technology?is?probably?the?mainly?mean?to?economically?and?efficiently?develop?these?reserves.?In?order?to?analyze?the?applicability?of?staged?fracturing?in?horizontal?well?completion?technology?in?Dagang?oilfield,?ap-plication trials of openhole packer staged fracturing completion, casing cementing sliding sleeve staged fracturing completion technol-ogy and hydraulic jet perforation completion with immovable string were conducted to form a new well completion technique, which take?the?casing?cementing?and?sliding?sleeve?subsection?fracturing?as?the?main?technology.?The?newly?process?has?the?advantages?of?integrated pipe column for well cementing, completion and staged fracturing, full size and fracturing operation continuous, which can shorten?the?working?period?and?sliding?sleeve?can?be?closed?for?water?blocking?point?in?late?water-producing?layer.?Meantime,?there?also?presents some problems with this technique such as wellbore production plug caused by ball dropping, poor cementing quality because of?rubber?plug?no?pressure?and?adjacent?wells?connection.?Aiming?at?the?existing?problems,?analysis?and?evaluation?were?conducted,?and?solutions?were?proposed?in?this?paper.?Field?application?primarily?realized?normal?production?of?oil?wells,?which?provides?founda-tion?for?the?further?scale?application?of?the?similar?staged?fracturing?completion?technology.