高压压汞对致密岩石表征的比表面积计算

IF 1.9 4区 材料科学 Q3 Materials Science Science and Engineering of Composite Materials Pub Date : 2023-01-01 DOI:10.1515/secm-2022-0186
Hao Kang, Guanghui Li, Jian Gao
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引用次数: 0

摘要

致密油作为非常规油气资源之一,在世界范围内具有广阔的开发前景。致密储层的表征对克服勘探中存在的问题,提高开发效果具有重要的指导意义。比表面积作为储层岩心的特征之一,对致密储层的表征具有重要意义。本研究以长庆油田致密储层岩心压汞数据为基础,通过建立等直径孔隙模型,分别计算不同半径对应的孔隙比表面积,得到岩心整体比表面积。通过对压汞数据和计算结果的综合评价,发现中等半径(0.009 ~ 0.178 μm)孔隙对孔隙体积的贡献最大,较小半径(0.004 ~ 0.007 μm)孔隙次之,较大半径(0.268 ~ 53.835 μm)孔隙对孔隙体积的贡献最小。半径较小的孔隙(0.004 ~ 0.089 μm)对比表面积的贡献最大,半径较大的孔隙(0.133 ~ 6.666 μm)对比表面积的贡献最小,中间区间的单个孔隙(8.917 μm)对比表面积的贡献最小。因此,在致密油开发过程中必须考虑表面活性剂的吸附损失等问题。在开发过程中,应探索压裂、新水/气注入、水平井开发等一系列主要技术。通过油藏规模的总体设计和规模实施,可以有效降低单位开采储量的投资成本,最终实现致密油开发效益的最大化。
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Calculation of specific surface area for tight rock characterization through high-pressure mercury intrusion
Abstract As one of the unconventional oil and gas resources, tight oil is of great development prospect all over the world. The characterization of tight reservoir has important guiding significance for overcoming the problems in exploration as well as improving the development effect. As one of the characteristics of reservoir cores, the specific surface area is very important for the characterization of tight reservoirs. In this study, based on mercury injection data of tight reservoir core from Changqing Oilfield, through the establishment of equal diameter pore model, the specific surface area of pores corresponding to different radii is calculated, respectively, and the overall specific surface area of the core is obtained. Through the comprehensive evaluation of the mercury injection data and the calculation results, it is found that the pores with the medium radius (0.009–0.178 μm) have the greatest contribution to the pore volume, followed by the pores with smaller radius (0.004–0.007 μm), and the pores with larger radius (0.268–53.835 μm) have the least contribution to the pore volume. However, the pores with smaller radius (0.004–0.089 μm) have the greatest contribution to the specific surface area, followed by the pore with larger radius (0.133–6.666 μm), and the specific surface area of individual pores in the middle range (8.917 μm) has the least contribution. Therefore, the adsorption loss of surfactant and so on must be considered in the process of tight oil development. In the development process, a series of main technologies such as fracturing, new water/gas injection, and horizontal well development should be explored. Through the overall design and scale implementation of reservoir scale, the investment cost of unit-producing reserves can be effectively reduced, and ultimately, the maximum benefit of tight oil development can be realized.
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来源期刊
Science and Engineering of Composite Materials
Science and Engineering of Composite Materials 工程技术-材料科学:复合
CiteScore
3.10
自引率
5.30%
发文量
0
审稿时长
4 months
期刊介绍: Science and Engineering of Composite Materials is a quarterly publication which provides a forum for discussion of all aspects related to the structure and performance under simulated and actual service conditions of composites. The publication covers a variety of subjects, such as macro and micro and nano structure of materials, their mechanics and nanomechanics, the interphase, physical and chemical aging, fatigue, environmental interactions, and process modeling. The interdisciplinary character of the subject as well as the possible development and use of composites for novel and specific applications receives special attention.
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