中深层稠油油藏蒸汽吞吐开发的合理井距探讨

方法应用客积法、产量特征法和数值模拟法，对辽河油区杜66块、齐40块、高3块三种典型的稠油油藏蒸汽吞吐开发合理井距及经济极限井距进行了计算研究。目的有效地提高储量动用程度，提高蒸汽吞吐阶段采收率；为同类油藏的合理开发提供依据。结果利用容积法计算杜66块、齐40块、高3块的合理开距分别是123．3、125．0、105．4m；利用产量特征法计算三个区块的合理井距分别是111.6、109．5、113．0m；利用数值模拟法计算三个区块的合理井距分别是100、100、1051。结论三种计算方法适用可行；综合确定三个区的经济极限井距分别为86．7、89．9、67．7m；在目前正方形井网格局已定的情况下，杜66块、齐40块、高3块的合理井距分别是100、100、105m。

An approach to rational well spacing for steam soaking development in middle deep heavy oil reservoir

Method This paper calculates and studies the rational well spacing and economic critical well spacing for steam soaking development of three typical types of heavy oil reservoirs that are block Du 66,Qi 40 and Gao 3 in Liaohe oil province by using volumetric method,production feature,and numerical modeling. Purpose To improve the producing degree and recovery factor of steam soaking period. These methods provide basis for rational developing of the same type of reservoir. Result The rational well spacings of block Du 66,Qi 40 and Gao 3 calculated by volumetric method are respectively 123. 3, 125. 0, 105. 4 m; the rational well spacings of these three blocks calculated by production feature method are respectively 111.6, 109. 5, 113. 0 m; the rational well spacings of the three blocks calculated by numerical modeling are respectively 100, 100, 105 m. Conclusion All thc three methods are feasible; the economic critical well spacings comprehensively determined for the three blocks are respectively 86. 7, 89. 9, 67. 7m; under the present situation of quadrate well pattern, the rational well spacings of block Du 66,Qi 40 and Gao 3 are respectively 100, 100, 105 m.