渤中凹陷古潜山砂砾岩抗压强度和砾石含量与射孔弹穿深关系

The relationship between the compressive strength and gravel content of buried hill sandstone in Bozhong depression and the penetration depth of perforating bombs

张兴华 盛廷强 周宝锁 林立明 李鸿儒 揭志军 李必红

ZHANG Xinghua SHENG Tingqiang ZHOU Baosuo LIN Liming LI Hongru JIE Zhijun LI Bihong

中海石油(中国)有限公司天津分公司 中海油田服务股份有限公司 物华能源科技有限公司

Tianjin Company, CNOOC (China), Tianjin 300452, China China Oilfield Services Limited, Tianjin 300452, China Wuhua Energy Technology Co., Ltd., Xi'an 710061, Shaanxi, China

渤中凹陷古潜山砂砾岩储层非均质性强、岩性致密，储层改造困难，为此开展了模拟储层复杂压力条件下穿砂砾岩靶的射孔试验，分析砂砾岩储层射孔穿深的主要影响因素。研究结果表明：相同条件下射孔弹在砂砾岩中穿深远小于砂岩，当砂砾岩石强度超过150 MPa后，超深穿透射孔弹在井下穿深小于200 mm，对目前国内外射孔弹能否有效穿透污染带存在较大挑战；随着砾石含量的提高，射孔穿深呈递减趋势，砾石含量每增加10%，平均穿深降低4.7%，岩石抗压强度和砾石含量是影响穿深的主要因素；由于砂砾岩储层岩性致密，岩石本身受应力影响较弱，对射孔孔道穿深影响较小。研究结果对砂砾岩储层射孔完井方案的优化设计具有一定的指导意义。

The buried-hill glutenite reservoirs in the Bozhong sag are characterized by strong heterogeneity and tight lithology, making reservoir reformation challenging. To address this, perforation tests were conducted under simulated complex reservoir pressure conditions to analyze the main factors affecting the perforation depth in glutenite reservoirs. The research results indicate that, under the same conditions, the penetration depth of perforating charge in glutenite is much smaller than in pure sandstone. When the strength of glutenite exceeds 150 MPa, the penetration depth of ultra-deep penetrating perforating charge underground is less than 200 mm, posing a significant challenge to whether current domestic and international perforating charge can effectively penetrate contamination zones. As the gravel content increases, the perforation depth exhibits a decreasing trend. For every 10% increase in gravel content, the average penetration depth decreases by 4.7%, and the rock compressive strength and gravel content are the main factors affecting penetration depth. Due to the tight lithology of the glutenite reservoirs, the rocks themselves are less affected by stress, which poses a minimal impact on the penetration depth of the perforation borehole. The research results provide a valuable guidance for optimizing and designing perforation completion schemes in glutenite reservoirs.

10.13639/j.odpt.202212034