CAJ | 학술논문

针对双水平井蒸汽辅助重力泄油(SAGD)蒸汽腔沿水平井长方向欠均匀发育的问题,以国内某油田 SAGD先导试验区为原型,设计了一套高温高压双水平井双管柱SAGD三维比例物理模型,对影响SAGD过程的重要油藏参数和操作参数进行了相似比例模化,利用高温高压物理模型进行了3组 SAGD 蒸汽腔发育实验.实验1:模拟现场趾端处汽腔发育迟缓,汽腔沿井长欠均匀发育的现象;实验2:在实验1的基础上采取注汽井长短管协同注汽-生产井长短管协同采油的调控策略;实验3:在实验1的基础上采取U型井SAGD调控策略.实验结果表明:两种调控策略均能使趾端附近发育缓慢的汽腔恢复发育,对于改善汽腔沿井长方向发育均匀性均有较好效果,调控后产油速率明显提高.图6表3参17
침대쌍수평정증기보조중력설유(SAGD)증기강연수평정장방향흠균균발육적문제,이국내모유전 SAGD선도시험구위원형,설계료일투고온고압쌍수평정쌍관주SAGD삼유비례물리모형,대영향SAGD과정적중요유장삼수화조작삼수진행료상사비례모화,이용고온고압물리모형진행료3조 SAGD 증기강발육실험.실험1:모의현장지단처기강발육지완,기강연정장흠균균발육적현상;실험2:재실험1적기출상채취주기정장단관협동주기-생산정장단관협동채유적조공책략;실험3:재실험1적기출상채취U형정SAGD조공책략.실험결과표명:량충조공책략균능사지단부근발육완만적기강회복발육,대우개선기강연정장방향발육균균성균유교호효과,조공후산유속솔명현제고.도6표3삼17
In steam assisted gravity drainage (SAGD) process, there is an uneven distribution of steam chamber growth along the whole length of the horizontal well. In order to solve this problem, a three-dimensional physical model of a high-temperature and high-pressure SAGD well pair was built. Several significant reservoirs and operation parameters for SAGD were also scaled in the model size, which was based on SAGD pilot development of a typical reservoir in China. Three experiments were conducted using the above-mentioned high-temperature and high-pressure physical model. Test 1 simulated the slow steam chamber growth at the toe end and uneven distribution of steam chamber growth. Test 2 tested the regulation strategy with dual tubing strings to adjust the steam chamber based on Test 1?combining the long and short tubing strings for injection well and production well. Test 3 tested the regulation strategy with U-shape wellbore to adjust the steam chamber. The results showed that the two regulation strategies were effective for recovering steam chamber growth at the toe end and making steam chamber growth uniform along the length of SAGD wellbore. After regulating, the oil rate increased significantly.