松辽盆地北部致密油勘探

摘要/Abstract

摘要： 松辽盆地北部中央坳陷区高台子油层和扶余油层发育致密砂岩油，累计资源潜力超过10×10⁸t。勘探实践证实，这种致密储层具有纵向不集中、横向不连续、单体规模小、物性变化大等非均质特性，且常规技术难以有效开发。自2011年以来，针对大庆油田致密储层非均质特性，从精细落实资源、水平井提产及有效开发等3个方面开展一体化联合攻关，探索建立了以资源精细评价、甜点精细刻画与水平井轨迹精细控制、油层增产改造为代表的致密油勘探适用技术系列，形成了以“实现有效开发”为目的的低成本、高效率工厂化实施方式。经过几年的探索实践，水平井油层平均钻遇率保持在75%以上，压后初期平均日产油30t以上，是周边直井的17倍；建成3个试验区，投产井累计产油超过7×10⁴t；新增三级储量超过2×10⁸t。

关键词: 致密油, 非均质特征, 勘探技术, 进展, 松辽盆地北部

Abstract: Tight sandstone oil is distributed in Gaotaizi and Fuyu oil reservoirs in the central depression in northern Songliao Basin, with accumulative resources more than 10×10⁸t. Based on exploration practices, the tight reservoirs are characterized by heterogeneity (vertically unconcentrated, laterally discontinuous, small single sand body, and variable physical properties), so they can not be developed effectively by using conventional techniques. As for heterogeneous characteristics of tight reservoirs in Daqing Oilfield, integrated technical research has been conducted since 2011 in three aspects of fine resource confirmation, horizontal well productivity increase and effective development. A series of tight oil exploration technologies have been developed, with fine resource assessment, fine sweet spot description and fine horizontal well trajectory control and oil reservoir stimulation as the representatives. Moreover, low-cost, high-efficiency factory mode has been formed for purpose of "effective development". It is shown by several years^’ practical exploration that the average oil reservoir encountering rate of horizontal wells remains above 75% and its average daily oil production at the early stage after fracturing is 30t/d, which is 17 times of its neighboring vertical wells. Three test areas are founded, with cumulative oil production more than 7 ×10⁴t and additional 3P reserves more than 2×10⁸t.

王玉华, 蒙启安, 梁江平, 白雪峰, 彭建亮, 薛涛, 汪佳. 松辽盆地北部致密油勘探[J]. 中国石油勘探, 2015, 20(4): 44-53.

Wang Yuhua, Meng Qi’an, Liang Jiangping, Bai Xuefeng, Peng Jianliang, Xue Tao, Wang Jia. Tight Oil Exploration in Northern Songliao Basin[J]. China Petroleum Exploration, 2015, 20(4): 44-53.

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