CAJ | 학술논문

运用气相色谱法对分离油和分离气进行了组成组分及原油物性分析。利用 PVTsim 得到 F 区块地层油组成组分，通过模拟多次脱气实验，研究了该区块原油的高压物性参数变化及影响其变化的因素，分析了分离级数及开采条件变化对流体组成及物性的影响。结果表明，该区块地层油具有轻烃(C1~C6)含量高、密度低、收缩性强、溶解气油体积比大的特点；与黑油相比，压力变化对 PVT 参数的影响更大；油藏流体 PVT 特征对分离级数具有强烈的敏感性，多级分离时，地层油收缩率较小，脱气量较小，产油量较大；小油嘴开采时，嘴前压力较高，原油中轻质组分脱气相对较少，采出的原油中轻质组分较高，轻质组分更容易被开采出来。
운용기상색보법대분리유화분리기진행료조성조분급원유물성분석。이용 PVTsim 득도 F 구괴지층유조성조분，통과모의다차탈기실험，연구료해구괴원유적고압물성삼수변화급영향기변화적인소，분석료분리급수급개채조건변화대류체조성급물성적영향。결과표명，해구괴지층유구유경경(C1~C6)함량고、밀도저、수축성강、용해기유체적비대적특점；여흑유상비，압력변화대 PVT 삼수적영향경대；유장류체 PVT 특정대분리급수구유강렬적민감성，다급분리시，지층유수축솔교소，탈기량교소，산유량교대；소유취개채시，취전압력교고，원유중경질조분탈기상대교소，채출적원유중경질조분교고，경질조분경용역피개채출래。
The separation oil and gas component and physical property are analyzed with gas chromatography.The component of initial oil in place in F block is obtained by using PVTsim.The changes of PVT parameters of oil in F block is studied and the effect of separation stages and choke size change on the fluid composition and physical properties is analysized.The results are listed as follows:the initial oil in F block has a characteristic of high content of light hydrocarbon,low density,high shrinkage and high gas-oil ratio,and the change of pressure has a greater influence on PVT parameters.Compared with black oil,reservoir fluid has a strong sensitivity on separation stages.When multi-stage separation is applied,initial oil in place e has a characteristic of high shrinkage,small degassed amount and high oil production.When small choke is applied,the pressure before choke is high.So light component is more likely to be mined.