CAJ | 학술논문

利用超高压流体相态分析系统测定不同温度、压力条件下天然气中凝析水的含量，利用半渗透隔板实验测定不同物性储层样品的最大含气饱和度，结合实际地质资料，分析莺歌海盆地DF区高温高压带气藏中水的来源、气藏较高含水饱和度及较低含气饱和度的原因。结果表明：甲烷气相中凝析水的含量随温度的增高而增加，随压力的增高反而降低，实验最高温度、最高压力条件下(180℃、130 MPa)甲烷气中凝析水的摩尔分数仅占整个气相体系的1.51%，说明高温高压条件下气藏中凝析水含量并不高，高温高压带气藏产出的水主要是孔隙水，凝析水不是主要的；储层含气饱和度主要与储层物性和是否发育隔层有关，储层物性变差，其最大含气饱和度迅速降低，非(或差)渗透性隔层的存在也会使气藏纯气段含气饱和度降低。莺歌海盆地DF区高温高压带天然气藏较高含水及较低含气饱和度的主要原因是低渗储层和隔层发育，而不是高的凝析水含量。
이용초고압류체상태분석계통측정불동온도、압력조건하천연기중응석수적함량，이용반삼투격판실험측정불동물성저층양품적최대함기포화도，결합실제지질자료，분석앵가해분지DF구고온고압대기장중수적래원、기장교고함수포화도급교저함기포화도적원인。결과표명：갑완기상중응석수적함량수온도적증고이증가，수압력적증고반이강저，실험최고온도、최고압력조건하(180℃、130 MPa)갑완기중응석수적마이분수부점정개기상체계적1.51%，설명고온고압조건하기장중응석수함량병불고，고온고압대기장산출적수주요시공극수，응석수불시주요적；저층함기포화도주요여저층물성화시부발육격층유관，저층물성변차，기최대함기포화도신속강저，비(혹차)삼투성격층적존재야회사기장순기단함기포화도강저。앵가해분지DF구고온고압대천연기장교고함수급교저함기포화도적주요원인시저삼저층화격층발육，이불시고적응석수함량。
The water content in the coexisting gas phase was measured under high temperature and high pressure, using an ultra-high pressure fluid PVT system. Using the micropore membrane technique, the maximum gas saturation of samples with different physical properties was measured. Based on the experimental results, and combined with the study of the actual geo-logical data, the source of water and the cause of gas reservoirs with high water saturation and low gas saturation are analyzed in the high-temperature and high-pressure zone of DF area, Yinggehai Basin. The results show that there is a positive correla-tion between water content in the coexisting gas phase and temperature, and a negative correlation between water content and pressure. The water content is not very high at the highest temperature of 180 ℃ and the highest pressure of 130 MPa in this experiment, with its mole fraction only accounting for 1. 51% of the whole gas phase system. The condensate water content in the gas reservoir is not very high at high temperature and pressure. The output water of gas reservoirs is mainly from pore wa-ter in the layers, and the condensate water is not the main source. The gas saturation of gas reservoirs are mainly controlled by the physical property of the reservoir and the impermeable interlayers. When the physical property becomes poor, its max-imum gas saturation will reduce rapidly. In addition, impermeable or poor permeable interlayers will also lead to the reduc-tion of the gas saturation in the gas reservoir. Therefore, low permeability reservoirs and the occurrence of interlayers should be the main causes of gas reservoirs with high water saturation and low gas saturation in the high-temperature and high-pres-sure zone of DF area, Yinggehai Basin, rather than the high condensate water content.