高含硫碳酸盐岩气藏衰竭实验研究  

A depletion experimental study of carbonate sour gas reservoirs

作　　者：蒋光迹[1] 汤思斯[1] 黄元和[1] 周永志 

机构地区：[1]中原油田普光分公司采气厂,四川达州636150 [2]西南油气田分公司川东北气矿,四川达州636150

出　　处：《石油化工应用》2013年第1期60-63,共4页Petrochemical Industry Application

摘　　要：普光气田属于高含H2S和CO2海相碳酸盐岩气田，具有气藏埋藏深、地层压力高、有边底水存在等特点。边底水会对普光气田的衰竭开发产生怎样的影响，目前尚不清楚。同时，国内外对高含硫碳酸盐岩气藏物理模拟实验研究较少，国内还未见高含硫气藏衰竭实验的报道。为此，结合普光气田现场实际，进行了无水体和1倍水体（1倍水体指水体的体积等于长岩心的烃类孔隙体积）的衰竭实验研究。首先取得无裂缝的碳酸盐岩岩心，进行孔隙度和渗透率测试（平均渗透率1mD），然后进行造缝（渗透率5～14mD），并将岩心组合成长岩心，最后采用高含硫气体（H2S含量为14．89％）进行了无水体和1倍水体衰竭实验。实验结果表明：无水体衰竭实验中，没有水产出。1倍水体衰竭实验中，一旦有水产出，产水量便迅速增加。1倍水体衰竭的天然气采出程度低于无水体衰竭的采出程度。无水体衰竭时，天然气中硫化氢含量变化不大；而1倍水体衰竭时，天然气中硫化氢含量逐渐增加。该实验结果对高含硫碳酸盐岩气藏的合理开发提供了技术支撑。The Puguang Gasfield is marine carbonate gas reservoir with a high content of H2S and CO,is characterized by a huge burial depth of gas reservoirs,high formation pressure,and the existence of bottom and edge water. At present,it is no clear what influence will bottom and edge water have on the development of Puguang gas field, and few studies have been made at home and abroad about depletion experiment of sour gas reservoirs. Therefore, depletion experiment without water and with 1 fold water body were carried out combination with production practice （ 1 fold water body refer to the volume of water is equal to hydrocarbon pore volume of the core）.In this paper the porosity and permeability of the non-fractured carbonate cores were first measured （the average permeability was lmD）,then fractures were generated in the cores （the fracture permeability was 5-14 mD）to combined into a long core, depletion experiments were studied with high sulfur gas （the content of H2S is 14.89 % ）.Experimental results indicate that water is not produced in the depletion experiment without water. While in the depletion experiment of 1 fold water body, water is produced quickly after water breakthrough. The recovery of the latter is lower than that of the former. The content of H2S has little change in the depletion experiment without water, while it is increased gradually in the latter experiment. The results of this experimental study provide great guidance for the development of carbonate sour gas reservoirs.

关 键 词：硫化氢 碳酸盐岩 气藏 衰竭 采收率 产水 

分 类 号：TE37[石油与天然气工程—油气田开发工程]