CAJ | 학술논문

为解决托甫台区块深井钻井过程中长裸眼穿过盐膏层时火成岩地层易漏、易塌及盐膏层易卡的问题，确保安全快速成井，将地应力分析软件 Drillworks 对测井资料的反演结果与实钻、测试资料结合，分析了托甫台区块地层的三压力剖面；利用巴西劈裂法与应力应变试验评价了火成岩地层的强度；根据成像测井资料和电镜扫描结果分析了火成岩裂缝分布特征，分析了桥堵技术难以提高火成岩地层承压能力的原因。通过以上分析，确定了托甫台区块含盐膏层深井的3个必封点与1个风险点，并据此设计了“专封盐膏层”井身结构。实钻效果表明，“专封盐膏层”井身结构可以解决托甫台区块深井长裸眼钻穿盐膏层过程中的井漏、坍塌和卡钻等井下故障。
위해결탁보태구괴심정찬정과정중장라안천과염고층시화성암지층역루、역탑급염고층역잡적문제，학보안전쾌속성정，장지응력분석연건 Drillworks 대측정자료적반연결과여실찬、측시자료결합，분석료탁보태구괴지층적삼압력부면；이용파서벽렬법여응력응변시험평개료화성암지층적강도；근거성상측정자료화전경소묘결과분석료화성암렬봉분포특정，분석료교도기술난이제고화성암지층승압능력적원인。통과이상분석，학정료탁보태구괴함염고층심정적3개필봉점여1개풍험점，병거차설계료“전봉염고층”정신결구。실찬효과표명，“전봉염고층”정신결구가이해결탁보태구괴심정장라안찬천염고층과정중적정루、담탑화잡찬등정하고장。
In order to solve the problems of lost circulation and collapsing in the igneous rock and sticking in evaporite formation during drilling long open hole through evaporite bed in Tuofutai Block ,opti-mization of casing program was carried out to ensure the safe and rapid drilling practices .By combining in-version results of Drillworks software with the practical field test data ,the three pressure profiles of Tuo-futai Block were analyzed .The strength of the igneous rock samples was assessed by using Brazilian test and stress-strain test .To determine the reason why the pressure sealing technology was difficult to improve bearing capacity of igneous rock formation ,the fracture distribution of the igneous rock was researched by using imaging logging data and scanning electron microscopy techniques .Based on three positions that had to be sealed and one risk in deep evaporates bed that were determined according to the analysis of the above results ,a special casing program for sealing evaporite bed was designed .Field application demonstrated that this new casing program could keep igneous rock and evaporite bed from downhole problems such as lost circulation ,collapsing and sticking .