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在对塔里木盆地奥陶系古潜山低渗裂缝性碳酸盐岩储层地质特征进行分析的基础上,利用人工裂缝岩样进行了应力敏感评价试验。结果表明,试验岩样存在较强的应力敏感性,平均渗透率损失92.48%,裂缝宽度下降76.37%。基于储层应力敏感性试验分析,对目前使用的正电胶钻井液体系配方进行了改进,取得了良好的应用效果。
Based on the analysis of the geological characteristics of the low permeability fractured carbonate reservoirs in the Ordovician buried hill in the Tarim Basin, stress sensitivity evaluation tests were conducted using artificial fractured rock samples. The results show that there is a strong stress sensitivity test rock samples, the average permeability loss of 92.48%, crack width decreased 76.37%. Based on the analysis of reservoir stress sensitivity test, the formula of the currently used positive gel drilling fluid system has been improved and a good application effect has been achieved.