CAJ | 학술논문

盆地地温和地压对油气成藏有重要的控制作用。针对珠江口盆地珠一坳陷的地温-地压系统特征研究薄弱的问题，以实测数据为基础，应用地温-地压系统概念，分析珠一坳陷3个典型凹陷的地温、地压及地温-地压系统特征，探讨其成因并分析其与油气分布的关系。认为珠一坳陷地温梯度表现为浅层低而深层高的特征；地压场表现为恩平组发育弱超压，文昌组发育中幅超压；珠一坳陷发育高压型复式地温-地压系统，即浅层为静压型地温-地压系统，深层为高压型地温-地压系统。迄今为止，珠一坳陷已发现的油气藏集中在浅部层系，以断层油气藏为主，而根据高压型复式地温-地压系统的基本特征，预测深部层系中极有可能发育与断裂活动无关的超压型岩性油气藏。显然查明地温-地压系统分布特征对珠一坳陷油气藏分布预测及勘探部署具有十分重要的指导意义。
분지지온화지압대유기성장유중요적공제작용。침대주강구분지주일요함적지온-지압계통특정연구박약적문제，이실측수거위기출，응용지온-지압계통개념，분석주일요함3개전형요함적지온、지압급지온-지압계통특정，탐토기성인병분석기여유기분포적관계。인위주일요함지온제도표현위천층저이심층고적특정；지압장표현위은평조발육약초압，문창조발육중폭초압；주일요함발육고압형복식지온-지압계통，즉천층위정압형지온-지압계통，심층위고압형지온-지압계통。흘금위지，주일요함이발현적유기장집중재천부층계，이단층유기장위주，이근거고압형복식지온-지압계통적기본특정，예측심부층계중겁유가능발육여단렬활동무관적초압형암성유기장。현연사명지온-지압계통분포특정대주일요함유기장분포예측급감탐부서구유십분중요적지도의의。
Geotemperature and pressure have a great controlling function on hydrocarbon generation,migration and accumulation.The characteristics of geotemperature-pressure system in Zhuyi Depression,Pearl River Mouth Basin are under-researched.By theory of geotemperature-pressure system,the geotemperature,formation pressure and geotemperature-pressure system in three typical sags are characterized and their relationship with hydrocarbon distribution is explored based on measured data.Research shows that Zhuyi Depression is charac-terized by rising geothermal gradient from top to bottom and rising overpressure extent with Enping Formation developing slight overpressure and Wenchang Formation developing moderate overpressure.Overpressure com-posite geotemperature-pressure system develops in Zhuyi Depression,namely normal geotemperature-pressure system of shallow layers and overpressure system of deep layers.So far the reservoirs discovered in Zhuyi Depression are mainly fault reservoirs distributed in shallow and middle layers.However,it is highly possible that overpressure lithological reservoirs are developed in deep layers,which is predicted according to the basic characteristics of overpressure composite geotemperature-pressure system.Finding out the characteristics of geo-temperature-pressure system is quite instructive in predicting hydrocarbon distribution and making exploration deployment in Zhuyi Depression.