CAJ | 학술논문

定向井钻井方位的确定是定向井钻井成败的关键。通过对定向井井壁周围应力的分布情况分析，依据库伦一摩尔强度准则和最大拉应力破裂准则，建立定向井井壁坍塌压力和破裂压力计算模型，并据此编制了定向井井壁稳定性分析软件。通过对谢凤桥油田地质、钻完井和测井资料的分析，确定了红花套组地应力大小及方向，并利用所编制的软件对不同钻井方位、不同井斜情况下定向井井眼稳定规律进行了模拟研究，最终确定沿最小水平主地应力方位钻井安全系数最高。
정향정찬정방위적학정시정향정찬정성패적관건。통과대정향정정벽주위응력적분포정황분석，의거고륜일마이강도준칙화최대랍응력파렬준칙，건립정향정정벽담탑압력화파렬압력계산모형，병거차편제료정향정정벽은정성분석연건。통과대사봉교유전지질、찬완정화측정자료적분석，학정료홍화투조지응력대소급방향，병이용소편제적연건대불동찬정방위、불동정사정황하정향정정안은정규률진행료모의연구，최종학정연최소수평주지응력방위찬정안전계수최고。
Suece.ss or failure in directional well drilling depends upon locating drilling azimuth of directional well. This paper has analyzed distribution of the stress around the wall of the directional well and on the base of Coulomb-- Moore strength criterion and maximum tensile stress criteria set up a model for calculating collapse or fracture pressure of the wall according to which a software has been worked out for analyzing the wall＇s stability. Through analyzing the information of geology, drilling and completion and logging in Xiefengqiao Oilfield, it has confirmed the strength of ground stress and its direction, and finally determined that it is safest to drill along with the direction of minimum horizontal ground stress by using the developed software to make a analog study on the regular pattern of hole stability in different drilling azimuth and different well deviation