新疆油田玛湖砂岩储层自悬浮支撑剂现场试验

doi:10.13809/j.cnki.cn32-1825/te.2023.04.013

油气藏评价与开发 ›› 2023, Vol. 13 ›› Issue (4): 513-518.doi: 10.13809/j.cnki.cn32-1825/te.2023.04.013

新疆油田玛湖砂岩储层自悬浮支撑剂现场试验

任洪达^1,²(),董景锋^1,²,高靓³,刘凯新¹,张敬春^1,²(),尹淑丽¹

1.中国石油新疆油田公司工程技术研究院，新疆克拉玛依 834000
2.新疆页岩油勘探开发重点实验室，新疆克拉玛依 834000
3.中国石油新疆油田油气储运公司，新疆克拉玛依 834000

收稿日期:2023-04-14 出版日期:2023-08-26 发布日期:2023-09-01
通讯作者: 张敬春（1984—）男，博士，高级工程师，主要从事储层改造、油田化学方面的研究。地址：新疆克拉玛依市胜利路87号，邮政编码：834000。E-mail：zhangjingchun1@petrochina.com.cn
作者简介:任洪达（1989—），男，硕士，工程师，主要从事油田压裂材料方面的研究。地址：新疆克拉玛依市胜利路87号，邮政编码：834000。E-mail：renhonda@petrochina.com.cn
基金资助:
新疆维吾尔自治区天山英才计划项目“油气储层改造新型支撑剂研发与应用”(2022TSTCJC0028);中国石油天然气股份公司科技项目“油田用化工新材料产品开发”(2020E-28)

Field test of self-suspending proppant at Mahu sandstone reservoir in Xinjiang Oilfield

REN Hongda^1,²(),DONG Jingfeng^1,²,GAO Jing³,LIU Kaixin¹,ZHANG Jingchun^1,²(),YIN Shuli¹

1. Engineering Technology Research Institute, Xinjiang Oilfield Company, CNPC, Karamay, Xinjiang 834000, China
2. Key Laboratory of Shale Oil Exploration and Development in Xinjiang, Karamay, Xinjiang 834000, China
3. Oil and Gas Storage Transportation Company of Xinjiang Oilfield, Karamay, Xinjiang 834000, Chian

Received:2023-04-14 Online:2023-08-26 Published:2023-09-01

摘要/Abstract

摘要：

目前大排量滑溜水压裂工艺已成为非常规油气资源开发的主要手段，由于滑溜水携砂能力有限，支撑剂在裂缝中沉降速度快、运移距离短，储层改造效果有待进一步提升。自悬浮支撑剂表面包裹的水溶性材料可提升其在滑溜水或清水中的悬浮效果，增大裂缝支撑体积。实验结果表明，自悬浮支撑剂基本技术指标满足标准要求，20 %砂比时在自来水中全悬浮时间小于40 s，且在90 ℃条件下能够稳定悬浮2 h以上，混合液破胶彻底。新疆油田在玛湖砂岩储层开展现场试验，实现清水连续携砂，最高砂质量浓度480 kg/m³，施工压力平稳。自悬浮支撑剂清水压裂技术在新疆油田的成功应用为后期油气资源工艺技术的选择提供参考。

关键词: 滑溜水, 支撑剂沉降, 自悬浮支撑剂, 清水压裂, 现场试验

Abstract:

Currently, the large-displacement slickwater fracturing process has become the primary method for developing unconventional oil and gas resource. However, the efficiency of this process is limited by the sand carrying capacity of slickwater, which results in rapid settlement and short migration distance of the proppant within the fractures, leading to a need for further improvement in the reservoir transformation effect. To address this issue, a water-soluble material is applied to coat the surface of the self-suspending proppant, enhancing its suspension effect in slickwater or clear water and thereby increasing the crack support volume. The self-suspending proppant meets the required technical standards, showing a total suspension time of less than 40 seconds in tap water at a 20 % sand ratio, and maintaining stable suspension for over two hours at 90 ℃ even during thorough mixing. In a practical on-site test at Mahu sandstone reservoir in Xinjiang Oilfield, continuous sand carrying was achieved using clean water, reaching a maximum sand concentration of 480 kg/m3 while maintaining stable construction pressure. The successful application of self-suspending proppant clear water fracturing technology in Xinjiang oilfield serves as a valuable reference for the selection of oil and gas resource technology in the future stage.

Key words: slickwater, proppant sedimentation, self-suspending proppant, clear water fracturing, field test

中图分类号:

TE355

任洪达, 董景锋, 高靓, 刘凯新, 张敬春, 尹淑丽. 新疆油田玛湖砂岩储层自悬浮支撑剂现场试验[J]. 油气藏评价与开发, 2023, 13(4): 513-518.

REN Hongda, DONG Jingfeng, GAO Jing, LIU Kaixin, ZHANG Jingchun, YIN Shuli. Field test of self-suspending proppant at Mahu sandstone reservoir in Xinjiang Oilfield[J]. Petroleum Reservoir Evaluation and Development, 2023, 13(4): 513-518.

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技术指标	检验项目
技术指标	圆度	球度	中间筛/ %	上筛/ %	下筛/ %	破碎率（28 MPa）/ %	视密度/ （g/cm³）	体积密度/（g/cm³）	酸溶解度/ %	浊度/ FTU
标准要求值	≥0.60	≥0.60	≥90.00	≤0.1	≤1.0.00	≤9.00			≤7.00	≤150.00
20/40目石英砂	0.71	0.72	95.00	0	0.20	5.60	2.43	1.53	3.20	51.00
20/40目自悬浮支撑剂	0.75	0.77	99.40	0	0.50	4.90	2.40	1.49	1.90	45.00
40/70目石英砂	0.72	0.73	99.10	0	0.10	5.50	2.46	1.54	2.10	40.00
40/70目自悬浮支撑剂	0.74	0.76	96.50	0	0.30	4.10	2.45	1.47	1.90	44.00

温度/℃	砂比/%	破胶剂加量/%	2 h后黏度/（mPa·s）	5 h后黏度/（mPa·s）	10 h后黏度（mPa·s）
60	20	0.20	12.3	4.1	3.1
	30	0.20	55.6	19.8	4.1
	40	0.20	76.2	36.4	4.2
90	20	0.15	18.3	3.8	3.3
	30	0.15	33.7	8.8	3.4
	40	0.15	55.6	23.8	3.2

项目	平台1		平台2
项目	试验1号井	对比1号井	试验2号井	对比2号井
改造段长/m	1 632	1 451	1 055	1 246
入井砂量/m³	1 295	1 160	956	1 140
支撑剂类型	20/40，40/70自悬浮	20/40，40/70石英砂	20/40，40/70自悬浮	20/40，40/70石英砂
加砂强度/（m³/m）	0.80	0.80	0.91	0.91
液体类型	清水+低黏滑溜水	低黏滑溜水+高黏胶液	清水+低黏滑溜水	低黏滑溜水+高黏胶液
施工排量/（m³/min）	10	10	10	10
最高砂质量浓度/（kg/m³）	480	440	480	420
前置液类型	低黏滑溜水	低黏滑溜水	低黏滑溜水	低黏滑溜水
连续携砂液类型	清水	高黏胶液	清水	高黏胶液
油层钻遇率/%	98.4	96.9	100	95.9
平均孔隙度/%	13.95	13.95	13.95	13.95
平均渗透率/10^-3μm²	6.09	6.09	6.09	6.09
含油饱和度/%	52.8	52.7	61.1	60.4
储层埋深/m	2 521.97	2 500.89	2 460.45	2 453.69
油层平均厚度/m	4.6	4.2	5.5	5.6
闭合应力/MPa	41.0	42.0	37.3	36.5

新疆油田玛湖砂岩储层自悬浮支撑剂现场试验

Field test of self-suspending proppant at Mahu sandstone reservoir in Xinjiang Oilfield

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