FRACTURING PROCESS FOR LOW PERMEABILITY RESERVOIRSEMPLOYING A COMPATIBLE HYDROCARBON-LIQUID CARBON DIOXIDEMIXTUREAbstractA method is described for fracturing a subterraneanformation penetrated by a wellbore. A fracturing fluidin the form of a mixture of liquid carbon dioxide and aliquid hydrocarbon component of specific characteristicsis injected down the wellbore under pressure to causefracturing. The hydrocarbon component contains at least70 wt. % of C5-C14 constituents and at least 8 wt. %aromatics and has an average molecular mass of less than200, a pour point of less than -40°C and a density of from0.77 to 0.85 g/ml at 15°C. This hydrocarbon componentprovides a higher viscosity than the liquid carbon dioxideat lower temperatures and is also an excellent solvent,simplifying clean-up. The novel fracturing fluid may alsocontain the usual proppants.
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机译：低渗透油藏的压裂过程雇用兼容的液态烃二氧化碳混合物抽象描述了一种用于地下破裂的方法井眼穿透的地层。压裂液以液态二氧化碳和特定特性的液态烃组分在压力下被注入井眼以引起压裂。碳氢化合物成分至少包含70重量的C5-C14成分的％和至少8重量％。 ％芳烃，平均分子量小于200，倾点低于-40°C，密度为在15°C时为0.77至0.85 g / ml。该烃成分提供比液态二氧化碳更高的粘度在较低的温度下也是很好的溶剂，简化清理。新型压裂液也可能包含通常的支撑剂。
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