| 摘要 |
Iron oxide particles having a high surface area, a high kinetic K value and composed substantially of amorphous Fe2O3 and crystalline Fe2O3 are drilling mud additives suitable for scavenging hydrogen sulfide. Such particles do not adversely affect the rheological properties of the mud and when reacted with hydrogen sulfide form reaction products which are acid stable. Upon completion of drilling, the drilling mud containing these iron oxide particles and their reaction products with H2S may be left in place between the inner casing and the formation wall or the outer casing as a packer fluid.
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