CAJ | 학술논문

河南油田张店地区地层黏土矿物含量高达60%～70%,地层倾角大,钻井过程中存在严重的地层造浆和井塌问题.由实验优选出高分子量聚合物、GW-1、OSAM-K及膨润土加量,形成了有机硅钻井液.经过在张店油田南38区块4口井中的应用表明,有机硅钻井液能有效地抑制地层造浆,防止井壁坍塌,减少井下复杂情况.应用有机硅钻井液的井,钻井液密度低,井径扩大率小,没有出现井塌、划眼和起下钻遇阻卡现象,4口井电测一次成功,没有因造浆外排钻井液.
하남유전장점지구지층점토광물함량고체60%～70%,지층경각대,찬정과정중존재엄중적지층조장화정탑문제.유실험우선출고분자량취합물、GW-1、OSAM-K급팽윤토가량,형성료유궤규찬정액.경과재장점유전남38구괴4구정중적응용표명,유궤규찬정액능유효지억제지층조장,방지정벽담탑,감소정하복잡정황.응용유궤규찬정액적정,찬정액밀도저,정경확대솔소,몰유출현정탑、화안화기하찬우조잡현상,4구정전측일차성공,몰유인조장외배찬정액.
Bore hole sloughing formation clay incorporation into drilling fluid were encountered in Block Zhangdian of Henan Oilfield because of the high active clay content in the formation penetrated and forma-tion dipping. An organosilicone drilling fluid formulated with chemicals of choice, such as a high molecular weight polymer, GW-1, OSAM-K etc was used in four wells in Zhangdian. Downhole troubles such as those caused by formation clay swelling were minimized. Mud density was reduced and tripping was done smoothly. Well loggings in four wells were conducted successfully, without any hindrance.