川西地区中浅层水平井高低井斜扭方位研究

STUDY ON TWISTING AZIMUTH IN HORIZONTAL WELL WITH HIGH & LOW DEVIATION IN WESTERN SICHUAN AREA

在"十二五"川西地区中浅层水平井规模开发下,因工区工农业发达、人口稠密、耕地紧张以及储层非均质性强等条件限制,使得部分水平井存在着井口-A靶-B靶三点连线不在同一方位问题,同时因参与川西地区各施工队伍技术水平差异化,使得对井眼轨迹优化设计和造斜井段扭方位施工等系列问题存在认识差异,影响着川西地区中浅层的开发进程。为此,从水平井轨迹设计入手,根据川西工区气藏埋深等特点,通过开展不同扭方位井眼轨迹工程因素评价,结合工区水平井定向及测井技术水平等特点,提出该类水平井宜采用低井斜扭方位轨迹设计和轨迹控制技术措施,有利于提高川西地区水平井设计及钻井施工水平。

Under the horizontal well development mode in Western Sichuan at 12th Five-Year Plan,the head-A & B target of part horizontal wells was in different azimuth that was due to the ground conditions and reservoir heterogeneity.At the same time,there was the different understanding in trajectory optimization and twisting azimuth because of the different technical level in the construction team.Therefore,this paper had started from the horizontal well trajectory design,carried on the borehole track engineering evaluation with different azimuth.Then,based on the features of the orientation & logging technology of horizontal well,the low inclination azimuth twisting trajectory design and trajectory control methods suited for Chuanxi horizontal well were put forward.It is helpful to improving the horizontal well design and drilling construction level.