CAJ | 학술논문

长水平段水平井拥有直井和一般水平井无法比拟的技术优势.然而由于其水平段较长、钻遇岩性的复杂多样、钻井液和钻具与地层接触时间长等因素使得在钻进和固井过程中存在很多技术难题.为提高长水平段水平井的钻井技术水平,首先对钻进和固井中的技术难题做了归纳总结,再对不同的技术难题做了原因分析,认为长水平段水平井的钻进技术难题主要由水平段过长造成,而固井技术难题主要是由水平段延伸方向与套管和水泥浆的重力方向垂直或近似垂直造成;最后结合现场实践提出了优化井眼轨迹,优化钻井液、水泥浆性能,优化钻进、固井工具组合,优化套管下入方法等技术措施,提高了钻进效率和固井质量,对今后长水平段水平井的钻进和固井施工有一定的指导作用.
장수평단수평정옹유직정화일반수평정무법비의적기술우세.연이유우기수평단교장、찬우암성적복잡다양、찬정액화찬구여지층접촉시간장등인소사득재찬진화고정과정중존재흔다기술난제.위제고장수평단수평정적찬정기술수평,수선대찬진화고정중적기술난제주료귀납총결,재대불동적기술난제주료원인분석,인위장수평단수평정적찬진기술난제주요유수평단과장조성,이고정기술난제주요시유수평단연신방향여투관화수니장적중력방향수직혹근사수직조성;최후결합현장실천제출료우화정안궤적,우화찬정액、수니장성능,우화찬진、고정공구조합,우화투관하입방법등기술조시,제고료찬진효솔화고정질량,대금후장수평단수평정적찬진화고정시공유일정적지도작용.
Long?lateral-section?horizontal?wells?play?an?important?role?in?exploiting?oil?and?gas?reservoir.?Compared?with?vertical?well?and?general?horizontal?well,?it?has?unparalleled?technical?advantages.?However,?because?of?some?factors?such?as?long?lateral-section,?complex rock lithology, and long contacting time by drilling liquids or drilling tools and formation, many technical problems rise in the?process?of?drilling?and?cementing.?To?raise?the?drilling?level?of?long?lateral-section?horizontal?wells,?the?paper?summarizes?these?problems?firstly,?and?analyses?the?reasons?of?drilling?and?cementing?difficulties?secondly.?It?concludes?that?the?drilling?difficulties?of?long?lateral-section?horizontal?wells?are?caused?by?the?long?lateral-section,?and?the?cementing?difficulties?are?mainly?caused?by?the?status?of?horizontal-section?being?vertical?or?approximately?vertical?to?the?gravity?direction?of?pipe?and?slurry.?Finally?the?paper?proposes?some?measures such as optimizing well trajectory, optimizing the performance of drilling liquids and cement liquids, optimizing drilling and cementing tools, and optimizing the tripping method of casing, which raises the quality of drilling and cementing and brings some guid-ance?on?the?drilling?and?cementing?of?long?lateral-section?horizontal?wells.