第39参第2期 2017年3月
石油钻采工艺
OIL DRILLING & PRODUCTION TECHNOLOGY
文章编号：10007393(2017）02013008
DOI:10.13639/j.odpt.2017.02.002
特低渗透油藏CO,非混相驱井距
与产量关系理论模型迟杰斌山吕广忠”汪佳蓓房平亮
1.中国地质大学（北京)能源学院；2.中国化胜利油田分公司勘深开发研究院
Vol. 39 No. 2 Mar.2017
引用格式：迟杰，勒斌山，吕广患，注佳蓓，房平亮.特低渗逹油藏CO，非混相驱井距与产量关系理论模型[J］.石油钻采工艺,2017,39(2)：130-137
摘要：依据预期产量建立并距模型对于确定合理并网密度具有重要意义。基于特低渗造油藏非线性渗流理论，考虑CO，对原油的降黏作用及油相启动压力梯度变化，建立了一维CO，非混相驱渗流数学模型。在此基础上，应用Buckley-Leverett驱替理论和渗流理论，建立了特低渗造油藏CO，非混相驱并距与产量关系理论模型，开发了井距计算软件并进行了实例计算和理论图版绘制。结果承明，考虑油轨度、油相启动压力梯度均变化时，并距最大；在驱替前期，油相启动压力梯度对并距的影响显等，而油相度对并距的影响较小，在驱替后期油相黏度对井距的影响逐渐变强；井距随预期产量的增加而减小，预期产量感小，并距增长得越快；并距随地层原油初始黏度、油相初始启动压力梯度的增加而减小。并距与产量关系理论模型给出了一种依据预期产量计算并距的快速计算方法，为油田并网部署提供了理论依据。
关键词：特低渗透油藏；非混相驱；启动压力梯度；产量；井距
中图分类号：TE34
文献标识码：A
Theoretical model for relationship between well spacing and oil production by CO, immiscible
flooding in the extra-low permeable reservoir CHI Jie',JU Binshan', LYU Guangzhong,WANG Jiabei',FANG Pingliang
1. College of Energy Resources of China University of Geosciences (Beijing), Beijing 100083, China;
2. Research Irstitufe of'Explonationt and Developmen, Shengli Oijfield Company, SINOPEC, Dongving 257015, Shandong, Ching
Citation: CHI Jie, JU Binshan, LYU Guangzhong, WANG Jiabei, FANG Pingliang. Theoretical model for relationship between well spacing and oil production by CO, immiscible flooding in the extra-low permeable reservoir [ J J . Oil Drilling & Production Tech-nology, 2017, 39(2): 130-137.
Abstract: Establishment of well spacing model according to the anticipated oil production has important significance to determine reasonable well spacing density. Based on non-linear seepage theory of extra-low permeable reservoir, consideringthe effect of CO, to reduce oil viscosity and the oil phase starting pressure gradient change, one-dimensional mathematical model for the seepage by CO, immiscible flooding was established. By the application of Buckley-Leverett displacement theory and seepage theory, the theoretical model for the relationship between well spacing and oil production by CO, immiscible flooding in the extra-low permeable reservoir was built and the wellspacing calculation software was developed for the example calculation and theoretical chart drawing. The results show that the well spacing is maximum with consideration of both viscosity and starting pressure gradient changes of the oil phase. In the early stage of displacement, the oil phase starting pressure gradient has significant effect on the well spacing while oil phase viscos-ity has small effect on the well spacing. In the later stage of the displacement, the effect of the oil phase viscosity on the well spacing
基金项目：国家科技重大专项"大型油气目及媒层气开发”（编号：2011ZX05009-006)资助。
第一作者：迟杰(1979-),2000年毕业于中国石油大学（华东)敦学专业茂学士学位，现为中国地质大学（北京)石沟与天然气工程专业博
士研究生，主要从事油气田开发工程方面的研究工作。通讯地址：(100082)北京事海淀区学院路29号中国地质大学北京西区 1A 楼306 宝。E-mail;chijie7980@163.com
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