CAJ | 학술논문

新疆油田已投入开发的气藏储层物性差异大，存在黏土膨胀、水敏和固相堵塞等伤害。常规管柱射孔后，需压井提出射孔枪串，更换成储层改造管柱。反复压井导致储层二次污染，更为严重的是气藏压力系数低，储层改造后入井液靠自身能量返排困难。为此研制了储层改造+氮气气举返排、射孔+储层改造+氮气气举返排一体化管柱，优选配套工具：针对气井工程口袋较长或下部无利用层的气井，推荐使用丢枪射孔工艺，否则采用全通径射孔工艺；固定式气举工作筒抗内压90.00 MPa、抗拉强度达到70.00 MPa及气举阀波纹管承载达到35.00 MPa；采用压井阀解决了完井管柱应用封隔器后无压井液循环通道的问题。基于氮气物性修正和引入Beggs&Brill两相流摩阻系数来修正储层改造液体与压井液的差异，考虑氮气返排与常规连续气举设计的差异，完善了氮气气举返排设计基础理论，研制了配套工艺设计。现场射孔+酸化+氮气返排试验证实：该工艺为解决同类气藏入井液返排难题提供了新的技术途径，具有较高的推广应用价值。
신강유전이투입개발적기장저층물성차이대，존재점토팽창、수민화고상도새등상해。상규관주사공후，수압정제출사공창천，경환성저층개조관주。반복압정도치저층이차오염，경위엄중적시기장압력계수저，저층개조후입정액고자신능량반배곤난。위차연제료저층개조+담기기거반배、사공+저층개조+담기기거반배일체화관주，우선배투공구：침대기정공정구대교장혹하부무이용층적기정，추천사용주창사공공예，부칙채용전통경사공공예；고정식기거공작통항내압90.00 MPa、항랍강도체도70.00 MPa급기거벌파문관승재체도35.00 MPa；채용압정벌해결료완정관주응용봉격기후무압정액순배통도적문제。기우담기물성수정화인입Beggs&Brill량상류마조계수래수정저층개조액체여압정액적차이，고필담기반배여상규련속기거설계적차이，완선료담기기거반배설계기출이론，연제료배투공예설계。현장사공+산화+담기반배시험증실：해공예위해결동류기장입정액반배난제제공료신적기술도경，구유교고적추엄응용개치。
The gas reservoirs in Xingjiang Oilfield bear the following characteristics:great reservoir property differences,clay swelling ,water sensitivity and solid plugging. After perforation using the conventional strings,the perforating gun strings need to be replaced by the fracturing strings by killing the well. Repetitively killing the well causes secondary damage of reservoir, and makes it difficult for the flowback of the fracturing fluid due to the low-pressure-factor of reservoir. Therefore,the integrated string technology of perforation,fracturing and cleanup was developed. For the long-pocket gas wells without lower production layer,throw gun perforation technology is recommended. Otherwise,the full size perforation technique is adopted. The internal and tensile strength of stationary gas lifting barrel can reach 90.00 MPa and 70.00 MPa respectively;the loading capacity of gas lifting valve bellows can reach 35.00 MPa. The research result not only compensates for the shortages of the conventional completion strings,but also provides new technological approach to solve problems for similar gas reservoirs in unloading kill fluid,shortening cleanup time,reducing reservoir damage,etc. This research has high promotional and applicable value.