致密砾岩油藏地层亏空区新井压裂参数优化设计

李杰; 马明伟; 杨升峰; 王松; 李蕴哲; 徐鹏; 李佶晔

doi:10.3969/j.issn.1006-6535.2023.03.022

特种油气藏 >

2023 , Vol. 30 >Issue 3: 168 - 174

DOI: https://doi.org/10.3969/j.issn.1006-6535.2023.03.022

钻采工程

致密砾岩油藏地层亏空区新井压裂参数优化设计

李杰 ,
马明伟 ,
杨升峰 ,
王松 ,
李蕴哲 ,
徐鹏 ,
李佶晔

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1.中国石油新疆油田分公司,新疆克拉玛依 834000;
2.北京阳光杰科科技股份有限公司,北京 100192;
3.中国石油华北油田分公司,河北廊坊 065000

李杰(1982—),男,高级工程师,2006年毕业于西南石油大学石油工程专业,2019年毕业于长江大学石油与天然气工程专业,获硕士学位,现主要从事油气田开发方面的工作。

收稿日期: 2022-08-31

修回日期: 2023-02-15

网络出版日期: 2023-07-13

基金资助

中国石油科技项目“水平井分段压裂体积改造技术V2.0现场试验”(2022ZS0607)

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Optimized Design of Fracturing Parameters for New Wells in Formation Deficit Zone of Tight Conglomerate Reservoir

Li Jie ,
Ma Mingwei ,
Yang Shengfeng ,
Wang Song ,
Li Yunzhe ,
Xu Peng ,
Li Jiye

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1. PetroChina Xinjiang Oilfield Company, Karamay, Xinjiang 834000,China;
2. Beijing Sunshine GEO-Tech Co., Ltd., Beijing 100192, China;
3. PetroChina Huabei Oilfield Company,Langfang,Hebei 065000,China

Received date: 2022-08-31

Revised date: 2023-02-15

Online published: 2023-07-13

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摘要

针对老井地层能量亏空对新井储层改造及生产存在影响的问题,在三维地质及地应力模型的基础上,建立油藏数值模型,结合生产资料研究老井应力场的动态变化规律,基于裂缝扩展模型预测新井裂缝形态特征,并优化压裂设计参数。研究表明:老井开发导致低应力区对邻井裂缝扩展有一定诱导作用,优化新井前置液比例,能够弥补地层能量亏空,避免新井人工裂缝向亏空方向过分延伸,储层改造更充分,压裂后产能更理想。玛湖砾岩油藏H1井组实例应用表明,优选簇间距为25~30 m,用液强度为18 m³/m,单簇前置液量为400 m³,能够有效抑制低应力区对新井人工裂缝的诱导,提高支撑剂的铺置浓度。该研究对同类砾岩油藏开发具有重要指导意义。

关键词： 动态地应力场; 地层亏空; 井间干扰; 压裂优化; 致密油藏

本文引用格式

李杰 , 马明伟 , 杨升峰 , 王松 , 李蕴哲 , 徐鹏 , 李佶晔 . 致密砾岩油藏地层亏空区新井压裂参数优化设计[J]. 特种油气藏, 2023 , 30(3) : 168 -174 . DOI: 10.3969/j.issn.1006-6535.2023.03.022

Abstract

To address the problem that the energy deficit of the old well formation has an impact on the reservoir stimulation and production of the new well, a numerical model of the reservoir is established on the basis of a three-dimensional geological and ground stress model, the dynamic change law of the stress field of the old well is studied in combination with the production data, the characteristics of the fracture pattern of the new well are predicted based on the fracture propagation model, and the fracturing design parameters are optimized. The study shows that the ground stress area caused by the development of old wells has an induced effect on the fracture propagation of neighboring wells, and optimizing the ratio of the front fluid in new wells can compensate for the formation energy deficit, avoid the artificial fracture in new wells from extending excessively in the deficit direction, so that the reservoir stimulation is more adequate and post-fracturing capacity is more desirable. The example application of Well Group H1 in the Mahu conglomerate reservoir shows that the preferred cluster spacing is 25-30 m, the fluid intensity used is 18 m³/m, and the single cluster pad fluid volume is 400 m³, which can effectively inhibit the induction of artificial fractures in new wells by low stress zones and improve the proppant placement concentration. This study has important guidance for the development of similar conglomerate reservoirs.

Key words： dynamic ground stress field; formation deficit; inter-well interference; fracturing optimization; tight reservoir

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