CAJ | 학술논문

　　目前定向射孔压裂时起裂压力的预测仅立足于裸眼的情况，忽视套管对起裂压力的影响，在工程应用中将产生较大的误差。考虑套管作用，推导建立定向井井周应力模型。假设地层岩石为张性破坏，并综合以上模型，得到定向射孔井水力压裂起裂压力和起裂角的预测模型。根据该模型编程开发一套定向射孔压裂起裂与射孔优化的软件，可预测定向射孔井的压裂起裂压力和起裂角，并优化选择射孔角度和射孔长度。应用软件对渤海油田三口井进行模拟计算和射孔优化，结果发现，模型的起裂压力预测结果与现场实测结果误差最大仅为4.33%，预测的起裂角也与实际结果相一致，从而验证了本模型的正确性。模型和软件对于现场压裂施工和射孔优化有重要的指导作用。
　　목전정향사공압렬시기렬압력적예측부립족우라안적정황，홀시투관대기렬압력적영향，재공정응용중장산생교대적오차。고필투관작용，추도건립정향정정주응력모형。가설지층암석위장성파배，병종합이상모형，득도정향사공정수력압렬기렬압력화기렬각적예측모형。근거해모형편정개발일투정향사공압렬기렬여사공우화적연건，가예측정향사공정적압렬기렬압력화기렬각，병우화선택사공각도화사공장도。응용연건대발해유전삼구정진행모의계산화사공우화，결과발현，모형적기렬압력예측결과여현장실측결과오차최대부위4.33%，예측적기렬각야여실제결과상일치，종이험증료본모형적정학성。모형화연건대우현장압렬시공화사공우화유중요적지도작용。
In the oriented perforation fracturing, current predicting initiation pressure just considers the naked borehole and neglects the effect of casing, which will lead to the greater errors in the engineering applications. Considering the effect of casing, wellbore stress models of directional well are obtained. According to tensile failure criteria, fracturing initiation pressure and angle models of oriented perforation well are presented. A software is developed, which includes the initiation prediction and perforation optimization of oriented perforation well. The software can predict the initiation pressure and initiation angle of oriented perforation fracturing considering the effect of casing, and optimize the perforation angle and length. Comparing to the actual initiation pressures, the maximum error of the prediction initiation pressures in the software is 4.33% and the predicting initiation angles are consistent with actual initiation angles, so as to prove the accuracy of fracturing initiation pressure and angle models. The models and software can offer instructions to the field fracturing and perforation optimization.