Sealed formation testing process of high hydrogen sulfide well

Abstract

The invention relates to a sealed formation testing process of a high hydrogen sulfide well. The sealed formation testing process of the high hydrogen sulfide well comprises an on-site installation process and an on-site formation testing process. According to the on-site installation process, the high hydrogen sulfide well is sequentially connected with a fluid conveying pipeline, a water jacket furnace and an oil-gas separator, wherein a gas outlet of the oil-gas separator is divided into two paths, one path is connected with a hoop gate valve, a separator exhaust pipeline and an ignition torch, and the other path is connected with the fluid conveying pipeline, the hoop gate valve and an oil inlet of a sealed measurement tank. An oil outlet of the sealed measurement tank is connected with the hoop gate valve, an anti-explosion oil conveying pump and an oil charging platform, and an exhaust port of the sealed measurement tank is connected with a flange gate valve I, an oil catcher, a liquid separating bag, an exhaust pipeline, a back-fire relief valve, a flange gate valve II and an emission combustion torch. According to the on-site formation testing process, mixed fluid entering the sealed measurement tank is separated in a slippage mode, separated liquid passes through the hoop gate valve and the anti-explosion oil conveying pump to the oil charging platform to be loaded on a vehicle and transported outwards, separated sulfur-contained natural gas passes through the flange gate valve I, the oil catcher, the liquid separating bag, the exhaust pipeline, the back-fire relief valve and the flange gate valve II to the emission combustion torch.

Description

technical field [0001] The invention relates to a closed oil testing process installed and used in wells with high hydrogen sulfide content. Background technique [0002] For the oil associated gas in the reservoir contains hydrogen sulfide, and even some wells have a hydrogen sulfide concentration exceeding 1000ppm. When testing oil for production, if open tanks are used for metering or direct loading, natural gas with high hydrogen sulfide content will spill out through the tank mouth after slipping, and the hydrogen sulfide concentration at the tank mouth of open metering tanks and crude oil trucks will generally exceed the critical concentration. At the same time, it spilled out into the air through the mouth of the tank, and the concentration of hydrogen sulfide in some well site operating areas exceeded the safety critical concentration, posing a serious threat to the life safety of production operators and personnel around the well site, and at the same time causing d...

AI Technical Summary

Problems solved by technology

When testing oil for production, if open tanks are used for metering or direct loading, natural gas with high hydrogen sulfide content will spill out through the tank mouth after slipping, and the hydrogen sulfide concentration at the tank mouth of open metering tanks and crude oil trucks will generally exceed the critical concentration. At the same time, it spilled out into the air through the mouth of the tank, and the concentration of hydrogen sulfide in some well site operating areas exceeded the safety critical concentration, posing a serious threat to the life safety of production operators and personnel around the well site, and at the same time causing discontinuous oil testing and production trials. Affects flowback and well production

However, if the injection of chemical desulfurization agent is used, the effect of chemical desulfurization is poor when the output is formation water or the water content is high. Increased operating costs

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