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| 基于能量理论的体积压裂工程改造效果评价模型及应用 |
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冯福平1,2,黄芮1,雷扬1,GUOBoyun3,胡超洋1,王胡振1,2
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(1.东北石油大学提高油气采收率教育部重点实验室,黑龙江大庆 163318;2.中国石油天然气集团有限公司油气藏改造 试井与评价重点研究室,黑龙江大庆 163318;3.University of Louisiana at Lafayette, Lafayette 70506, USA)
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| 摘要: |
| 体积压裂工程改造效果主要受储层改造体积(SRV)及其内部裂缝密度和导流能力的影响,由于微地震得出的SRV不能反映改造体积内裂缝的密度和导流能力,因此仅依靠SRV不能真实准确地反映体积压裂的工程效果。根据能量守恒和物质平衡原理,通过变分法建立改造体积内平均裂缝长度和等效裂缝条数计算模型,得到用于描述改造体积内裂缝密度和导流能力的关键参数,在此基础上综合考虑影响体积压裂工程改造效果的改造体积、裂缝密度和导流能力,提出体积压裂工程改造效果评价参数计算模型。应用效果表明,该评价参数在有微地震监测井和无微地震监测井中与产能之间均具有较好的相关性,实现了对体积压裂工程改造效果的准确评价,为油气井体积压裂产能影响因素分析提供了有效的区分手段。 |
| 关键词: 体积压裂 工程改造效果 裂缝密度 裂缝长度 储层改造体积 |
| DOI：10.3969/j.issn.1673-5005.2019.01.010 |
| 分类号::TE 357 |
| 文献标识码:A |
| 基金项目:黑龙江省普通本科高等学校青年创新人才培养计划(UNPYSCT-2016127);中国博士后科学基金项目(2018M641802) |
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| Evaluation of engineering effectiveness of volume fracturing based on energy conservation principles and its application |
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FENG Fuping1,2, HUANG Rui1, LEI Yang1, GUO Boyun3, HU Chaoyang1, WANG Huzhen1,2
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(1.Key Laboratory of Education Ministry for Enhanced Oil Recovery, Northeast Petroleum University, Daqing 163318, China;2.Key Laboratory of Reservoir Stimulation, CNPC, Daqing 163318, China;3.University of Louisiana at Lafayette, Lafayette 70506, USA)
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| Abstract: |
| The engineering effectiveness of volume fracturing can be influenced by several factors including the stimulated reservoir volume (SRV) and the density and conductivity of the fractures. The SRV derived from the microseismic data cannot be used as the only parameter to characterize the engineering effectiveness of a hydraulic fracturing process. In this study, based on the principles of energy conservation and material balance, a model was established to calculate the average fracture length and number in the SRV by means of a variation method, which can provide key parameters to describe the fracture density and conductivity in the SRV. For a case study of tight reservoirs, an evaluation model was established in terms of an evaluation parameter, in which the SRV, the fracture density and fracture conductivity were considered to evaluate the engineering effectiveness of the volume fracturing. The field application analysis shows that the evaluation parameter has a positive relationship with the real field productivity whether there are seismic monitoring data or not, and the method can realize the accurate evaluation of the engineering effectiveness of volume fracturing, and provide an effective means for distinguishing the influence factors of well production. |
| Key words: volume fracturing engineering effectiveness of fracturing fracture density fracture length stimulated reservoir volume |
