大庆致密油储层数模与物模相结合支撑剂优选方法

Optimal selection method of proppant combined with mathematical and physical models in Daqing tight oil reservoir

大庆致密油储层具有严重的非均质特性,不同区块储层物性和闭合压力不同。所需裂缝的导流能力随着储层条件的变化而不同。为了提高支撑剂优选的针对性,开展了主要通过数值模拟方法,基于大庆致密油物性条件,建立了流度与最佳裂缝导流能力图版。对大庆油田常用的支撑剂进行不同闭合压力下的长期导流能力实验,建立了不同闭合压力下各支撑剂导流能力图版。在支撑剂选取上,以上两个图版配合使用,结合储层的渗透率以及原油黏度,再根据实际地层的闭合压力,可进行支撑剂类型的快速优选。该方法为大庆致密油开发提供了有力的技术支撑。

Tight oil reservoirs in Daqing have serious heterogeneity.The physical properties and closure pressure of reservoirs in different blocks are different,and the conductivity of fractures changes with the reservoir conditions.In order to improve the pertinence of proppant selection,the chart of fluidity and optimal fracture conductivity has been established by numerical simulation method based on the physical properties of tight oil reservoirs in Daqing Oilfield.The experiment of proppant for its long-term conductivity used in Daqing Oilfield has been conducted under different conditions of closure pressure,and the conductivity chart of each kinds of proppant under different closure pressure was established.For the selection of proppant,the combination of the above two charts,combined with reservoir permeability and crude oil viscosity,can be used for rapid selection of optimal type of proppant according to actual closure pressure of formation.The method has provided a powerful technical support for the development of tight oil reservoirs in Daqing.