新疆油田氮气气举一体化管柱快速返排研究

doi:10.11885/j.issn.1674-5086.2014.03.03.02

摘要/Abstract

摘要：

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。

关键词: 射孔, 储层改造, 入井液返排, 一体化管柱, 氮气气举

Abstract:

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.

Key words: perforation, fracturing, flowback, integrated string, nitrogen gas lift

王晓磊，杨海，洪将领，李彦岭. 新疆油田氮气气举一体化管柱快速返排研究[J]. 西南石油大学学报(自然科学版), DOI: 10.11885/j.issn.1674-5086.2014.03.03.02.

Wang Xiaolei, Yang Hai, Hong Jiangling, Li Yanling. Research on Nitrogen Gas Lift Cleanup in Xingjiang Oilfield[J]. 西南石油大学学报(自然科学版), DOI: 10.11885/j.issn.1674-5086.2014.03.03.02.

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