准噶尔盆地中部I区块坍塌压力分析

准噶尔盆地腹部地区中部I区块是中国石化西部新区勘探的重点区块,通过庄1井、沙1井2口探井的钻井发现了工业油气流.在钻井施工中,白垩系、侏罗系地层井壁失稳严重.在室内岩芯实验的基础上,确定了影响该区块坍塌压力计算的基础参数,从而确定出保持井壁稳定所需的钻井液密度,为该区今后的油气勘探开发提供了保证.

ANALYSIS ON COLLAPSE PRESSURE IN BLOCK I OF JUNGGAR BASIN

Block I in Junggar Basin is the most important block of the western new exploration area of SINOPEC. Commercial oil and gas have been found in the well Z1 and S1. In the drilling process,the collapse of wellbore wall is severe in the Cretaceous and Jurassic strata. On the base of core experiment,the basic parameters that influence the collapse are calculated,and mud density for the stability of wellbore wall is determined. All of these ensure the further exploration and developing of oil and gas in future.