宝浪油田改性淀粉调剖体系配方筛选  

Preparation of Modified Starch/Phenolic Resin Gelling Fluid as Profile Modificator for Baolang Oilfield

作　　者：吴天江[1] 李华斌[1] 伊向艺[1] 张云善[2] 任辉 

机构地区：[1]油气藏地质及开发工程国家重点实验室(成都理工大学),四川成都610051 [2]中国石化西南油气田分公司川西采输处,四川德阳618000 [3]中国石油辽河油田分公司高升采油厂地质研究所,辽宁盘锦124125

出　　处：《油田化学》2008年第4期348-351,共4页Oilfield Chemistry

摘　　要：宝浪油田储层高温高盐且含煤（隔夹）层，注入水易沿煤层窜进。为了有效封堵储层煤层，筛选了自行合成的丙烯酰胺接枝改性淀粉为主剂的凝胶配方：改性淀粉3000mg／L、乌洛托品750mg／L、间苯二酚400mg／L、草酸800mg／L；改性淀粉与鸟洛托品之比4：1时体系比较稳定。初配的体系剪切至黏度下降50％，成胶后黏度仍大于20Pa·s；该体系热老化稳定性较好，在80℃下放置90天后在80℃下测定的凝胶黏度高于20Pa·s；在60℃下放置90天后在60℃下测定的凝胶黏度高于25Pa·s。该体系对不同渗透率（0．06-0．41μm^2）岩心的封堵率在98％以上。图6表2参7。Baolang oil reservoirs are featured by higher terrnperatures, 83-110℃, higher formation water salinity, TSD = 43 g/L, and existance of coal seam interlayers, which serves as by-pass passages and channels for injected flooding water. To effectively ping these coal seam interlayers, a profile modifying gelling fluid is developed and comprises per liter gelling fluid： 3000 mg acrylamide graft starch （modified starch, MS）, 750 nag urotropine （U）, 400 mg resorcin, and 800 mg oxalic add. More stable gel is formed at MS/U mass ratio= 4/1. The gelling fluid, sheared to viscosity loss reaching 1/2, forms gel of viscosity 〉20 Pa＇s. The viscsity of the fluid, having gelled and aged over 90 days at 80℃ is 〉20 Pa＇s and at 60℃-〉25 Pa＇s, which demonstrates good long term thermal stability of the gel formed. The plugging rate of the gelled fluid in cores of permeability 60× 10^-3-410 × 10-3μm^2 is 〉 98%.

关 键 词：调剖剂 改性淀粉/酚醛树脂体系 水基凝胶 组成与配方 地下成胶 高温高盐油藏 宝浪油田 

分 类 号：TE39[石油与天然气工程—油气田开发工程] TE357.62