| 摘要 |
A post cold heavy oil production with sand ("CHOPS") microbial enhanced oil recovery ("MEOR") method comprises selecting a well in communication with a reservoir having at least one wormhole and that is being subjected to or has completed primary CHOPS production and determining whether the reservoir contains a sufficient amount of a gas-producing indigenous microbe to re-pressurize a drainage portion of the well to a target pressure or to generate a target amount of gas. When the reservoir does not contain a sufficient amount of the indigenous microbe, then an injectant is prepared comprising a sufficient amount of a gas-producing microbe to re-pressurize the drainage portion of the well to the target pressure or to generate the target amount of gas, a nutrient suitable for the microbe, and a fluid base. When the reservoir does contain a sufficient amount of the gas producing indigenous microbe, then an injectant is prepared comprising a suitable nutrient for the indigenous microbe and the fluid base. Then, the injectant is injected through the well and into the at least one wormhole in the reservoir; the well is shut in until the pressure in the well reaches the target pressure or the target amount of gas is generated; and then the well is produced.
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