页岩气勘探开发实验测试技术挑战与发展方向

doi:10.13809/j.cnki.cn32-1825/te.2021.02.004

摘要/Abstract

摘要：

随着中国页岩气工业的蓬勃发展,页岩气地质评价实验测试技术不断完善。国内目前形成了一套以岩心前处理、矿物成分、地球化学、孔隙结构、物理性质、力学性质及含气量为主的七大类技术系列。而页岩储层作为一种细粒沉积,相对于传统砂岩、砾岩、粉砂岩等碎屑岩储层,具有典型低孔、特低渗特征,且天然裂缝及微纳米孔隙发育,由此给页岩气地质评价实验技术带来了4个方面的挑战：即沉积微相多变、成岩演化复杂、孔隙结构表征困难和流体流动机理多元。为进一步加快中国页岩气勘探开发进程,解决实际生产过程中瓶颈和问题,对页岩气地质评价实验测试技术提出了4个方向的展望：①储层精细描述亟待由静态表征向动态演化发展;②储层孔隙及孔隙内流体赋存方式的研究向真实地质条件下的模拟实验发展;③孔隙表征由单一尺度向宏观、微观多尺度融合发展;④基于大数据的实验数据挖掘向产能评价和预测发展,以期为中国页岩气勘探开发技术和理论发展提供重要依据。

关键词: 页岩气, 地质评价, 实验测试技术, 孔隙表征, 多尺度融合

Abstract:

With the rapid development of the shale gas industry in China, the shale gas geological evaluation experimental testing technology has been continuously improved. At present, a series of technology, mainly including core pretreatment, mineral composition, geochemistry, pore structure, physical properties, mechanical properties and gas content, has been formed in China. Compared with traditional sandstone, conglomerate, siltstone and other clastic reservoirs, shale reservoir, as a fine-grained deposit, has typical characteristics of low porosity and ultra-low permeability, and the natural fractures and micro nano pores develop. Therefore, it brings four challenges to the experimental technology of shale gas geological evaluation: the sedimentary microfacies are changeable, the diagenetic evolution is complex, the pore structure characterization is difficult and the fluid flow mechanism is diverse. In order to further speed up the progress of shale gas exploration and development in China and solve the bottleneck and problems in the actual production process, four directions are put forward for the experimental testing technology of shale gas geological evaluation, that is, ①the fine description of reservoir urgently needs to be developed from static characterization to dynamic evolution, ②the researches of reservoir pore and fluid occurrence mode in pore develop into simulation experiment under real geological conditions, ③the porosity characterization develops from single scale to macro-micro multi-scale integration, ④experimental data mining based on big data develops into capacity evaluation and prediction. All these are expected to provide reference for the development of the shale gas exploration and development technology and theory in China.

Key words: shale gas, geological evaluation, experimental testing technology, pore characterization, multiscale fusion

中图分类号:

TE135

高玉巧,蔡潇,何希鹏,丁安徐,高和群,吴艳艳,夏威. 页岩气勘探开发实验测试技术挑战与发展方向[J]. 油气藏评价与开发, 2021, 11(2): 164-175.

GAO Yuqiao,CAI Xiao,HE Xipeng,DING Anxu,GAO Hequn,WU Yanyan,XIA Wei. Challenges and development direction of experimental testing technology for shale gas exploration and development[J]. Reservoir Evaluation and Development, 2021, 11(2): 164-175.

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