延长气田气井清洁压裂液体系研究与应用
发布时间：2018-11-27 16:11
【摘要】：延长气田气井属于典型低渗透储层,具有“低孔、低渗、低压、低丰度、低产”的特点。从目前形势看,延长气井生产开发仍有很大的发展空间,但对于开发技术的依赖度在迅速增加。针对延长气田气井目前压裂液存在的问题,结合延长气田气井储层基本地质特征开发研究了新型清洁压裂液体系。对延长气田岩心的孔隙度、渗透率和岩心组成成分进行了分析。分析结果表明,延长气田已开发的储层属于“低孔、低渗、致密性砂岩”气藏,其岩心主要由石英、方解石、绿泥石及高岭石组成。根据延长气田的地质储层特点及清洁压裂液作用机理,以1,4-二溴丁烷(1,6-二溴己烷)和十八叔胺为原料,合成了适用于延长气田压裂开发的N,N′-双(十八烷基二甲基)-1,4-二溴化己二铵盐(C18-4-C18·2Br-)和N,N′-双(十八烷基二甲基)-1,6-二溴化己二铵盐(C18-6-C18·2Br-)两种双子表面活性剂,产物经过红外光谱(IR)、核磁共振氢谱(1H NMR)和元素分析等进行了确证,结果表明合成产物即为目标设计分子。以十八烷基三甲基氯化铵(1831)、C18-4-C18·2Br-、C18-6-C18·2Br-和LQ-1超分子表面活性剂为主剂,通过系统实验筛选了1831、双子表面活性剂及LQ超分子表面活性剂清洁压裂液配方体系。参照SY/T 5107-2005《水基压裂液性能评价方法》和SY/T6376-2008《压裂液通用技术条件》对1831清洁压裂液体系、双子表面活性剂压裂液体系和超分子表面活性剂压裂液体系进行综合性能评价。通过黏温曲线可知1831清洁压裂液体系不适于中高温(80℃~120℃)清洁压裂液体系,而双子表面活性剂和超分子表面活性剂清洁压裂液体系具有较好的耐温性能,适于110℃下的压裂改造作业。并对双子表面活性剂和超分子表面活性剂清洁压裂液体系的黏温性能、流变性能、抗剪切性能、悬砂性能及破胶性能进行了综合评价。实验结果表明双子表面活性剂和超分子表面活性剂清洁压裂液体系的各项性能指标均符合SY/T 6376-2008《压裂液通用技术条件》中的要求。岩心伤害实验结果表明这两种清洁压裂液体系对延长气田的储层伤害较小,适合延长气田的压裂改造作业。根据延340S井山23层试气地质方案编写压裂施工设计,选取LQ超分子表面活性剂清洁压裂液体系进行现场试验,现场试验结果表明:LQ清洁压裂液体系现场施工顺利,性能达到设计要求。
[Abstract]:Yanchang gas well is a typical low permeability reservoir with the characteristics of low porosity, low permeability, low pressure, low abundance and low production. According to the present situation, there is still a lot of room for development in extending the production and development of gas wells, but the dependence on development technology is increasing rapidly. In view of the problems existing in the gas well fracturing fluid in Yanchang gas field, a new type of clean fracturing fluid system is studied in combination with the basic geological characteristics of the gas well reservoir in Yanchang gas field. The porosity, permeability and core composition of Yanchang gas field core are analyzed. The results show that the developed reservoirs in Yanchang gas field belong to "low porosity, low permeability and tight sandstone" gas reservoirs, the core of which is mainly composed of quartz, calcite, chlorite and kaolinite. According to the geological reservoir characteristics of Yanchang gas field and the action mechanism of clean fracturing fluid, Ns suitable for fracturing development in Yanchang gas field was synthesized by using 1n 4-dibromobutane and octadecylamine as raw materials. N- bis (octadecyl dimethyl) -1n 4- dibromohexylammonium bromide (C18-4-C18 _ 2Br-) and N, Two kinds of Gemini surfactants, C18-6-C18 _ 2Br-, were confirmed by IR, (IR), 1H NMR and elemental analysis, respectively, in which two kinds of Gemini surfactants, Nb-bis (octadecyl dimethyl) -1-dibromohexylammonium salt (C18-6-C18 _ 2Br-), were confirmed by IR, 1H NMR and elemental analysis. The results show that the synthesized product is the target molecule. Using octadecyl trimethylammonium chloride (1831), C18-4-C18 2Br-C18-C182Br- and LQ-1 supramolecular surfactants as main agents, 1831. Gemini surfactant and LQ supramolecular surfactant clean fracturing fluid formulation system. According to SY/T 5107-2005 "method of performance Evaluation of Water Base fracturing fluid" and SY/T6376-2008 "General Technical condition of fracturing fluid", 1831 clean fracturing fluid system was studied. The comprehensive properties of Gemini surfactant fracturing fluid system and supramolecular surfactant fracturing fluid system were evaluated. The viscosity curve shows that 1831 clean fracturing fluid system is not suitable for medium and high temperature (80 鈩，
本文编号：2361407
[Abstract]:Yanchang gas well is a typical low permeability reservoir with the characteristics of low porosity, low permeability, low pressure, low abundance and low production. According to the present situation, there is still a lot of room for development in extending the production and development of gas wells, but the dependence on development technology is increasing rapidly. In view of the problems existing in the gas well fracturing fluid in Yanchang gas field, a new type of clean fracturing fluid system is studied in combination with the basic geological characteristics of the gas well reservoir in Yanchang gas field. The porosity, permeability and core composition of Yanchang gas field core are analyzed. The results show that the developed reservoirs in Yanchang gas field belong to "low porosity, low permeability and tight sandstone" gas reservoirs, the core of which is mainly composed of quartz, calcite, chlorite and kaolinite. According to the geological reservoir characteristics of Yanchang gas field and the action mechanism of clean fracturing fluid, Ns suitable for fracturing development in Yanchang gas field was synthesized by using 1n 4-dibromobutane and octadecylamine as raw materials. N- bis (octadecyl dimethyl) -1n 4- dibromohexylammonium bromide (C18-4-C18 _ 2Br-) and N, Two kinds of Gemini surfactants, C18-6-C18 _ 2Br-, were confirmed by IR, (IR), 1H NMR and elemental analysis, respectively, in which two kinds of Gemini surfactants, Nb-bis (octadecyl dimethyl) -1-dibromohexylammonium salt (C18-6-C18 _ 2Br-), were confirmed by IR, 1H NMR and elemental analysis. The results show that the synthesized product is the target molecule. Using octadecyl trimethylammonium chloride (1831), C18-4-C18 2Br-C18-C182Br- and LQ-1 supramolecular surfactants as main agents, 1831. Gemini surfactant and LQ supramolecular surfactant clean fracturing fluid formulation system. According to SY/T 5107-2005 "method of performance Evaluation of Water Base fracturing fluid" and SY/T6376-2008 "General Technical condition of fracturing fluid", 1831 clean fracturing fluid system was studied. The comprehensive properties of Gemini surfactant fracturing fluid system and supramolecular surfactant fracturing fluid system were evaluated. The viscosity curve shows that 1831 clean fracturing fluid system is not suitable for medium and high temperature (80 鈩，
本文编号：2361407
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