【摘要】：基于地震、鉆井、分析化驗(yàn)等資料,在成盆背景、結(jié)構(gòu)特點(diǎn)和沉積特征研究基礎(chǔ)上,采用烴源巖測(cè)井評(píng)價(jià)和盆地模擬資源評(píng)價(jià)技術(shù),對(duì)冀中坳陷保定凹陷古近系孔店組—沙四段烴源巖和資源潛力進(jìn)行系統(tǒng)評(píng)價(jià),綜合分析其油氣勘探前景與有利勘探方向。研究表明,保定凹陷為受太行山東斷裂帶控制形成的西斷東超的箕狀斷陷,與冀中坳陷西部的廊固、徐水、石家莊等凹陷具有相似的成盆背景與構(gòu)造—沉積演化特征。古近系孔店組—沙四段沉積期,保定凹陷北部與霸縣凹陷淀北洼槽、徐水凹陷相互連通,為同一匯水湖盆,發(fā)育沙四段—孔一段、孔二段—孔三段兩套咸化半深湖—深湖相烴源巖,其中有機(jī)碳含量大于2%的優(yōu)質(zhì)烴源巖分布面積分別為1470km~2和910km~2,洼槽區(qū)厚度為10~140m。保定凹陷預(yù)測(cè)石油資源量為(1.27~2.03)×10~8t,天然氣資源量為(270.24~333.29)×10~8m~3,這些油氣資源主要聚集于潛山層系和孔店組。該凹陷具備良好的油氣勘探前景,區(qū)內(nèi)"洼中隆"型清苑潛山披覆背斜構(gòu)造成藏條件良好,可形成"新生古儲(chǔ)"型潛山油氣藏和孔一段構(gòu)造油氣藏,是有利的勘探突破口之一。
[Abstract]:Based on seismic, drilling, analytical and laboratory data, based on the study of basin background, structural characteristics and sedimentary characteristics, hydrocarbon source rock logging evaluation and basin simulation resource evaluation techniques are adopted. The hydrocarbon source rocks and resource potential of Gongdian formation-Sha 4 member of Paleogene in Baoding depression of Jizhong depression are systematically evaluated and their oil and gas exploration prospects and favorable exploration directions are comprehensively analyzed. The study shows that Baoding sag is a dustpan shaped depression controlled by the Taihang Shandong fault zone, and has similar basin setting and tectonic-sedimentary evolution characteristics as the Langgu, Xushui and Shijiazhuang sag in the west of Jizhong depression. During the sedimentary period of the Kongdian formation and the fourth member of the Shahejie formation in the Paleogene, the northern Baoding sag and the northern Dianbei depression of the Baxian sag are connected to each other, which is the same catchment lake basin. There are two sets of halo-deep lacustry-deep lacustrine source rocks in the second and third member of the pore. The distribution area of the high quality source rocks with organic carbon content more than 2% is 1470km~2 and 910km2, respectively, and the thickness of the depression area is 1010 ~ 140m. The predicted oil resources and natural gas resources in Baoding sag are (1.27 ~ 2.03) 脳 10 ~ (8) t and (270.24) ~ (333.29) 脳 10 ~ (8) m ~ (-1) 路m ~ (3) respectively. These oil and gas resources are mainly concentrated in buried hill series and Kongdian formation. The sag has a good prospect for oil and gas exploration. The structure of Qingyuan buried hill in "middle uplift" type in this area has good reservoir forming conditions, which can form a "new ancient reservoir" type buried hill reservoir and a structural reservoir in the first section of the pore, which is one of the favorable breakthrough points for exploration.
【作者單位】： 中國(guó)石油華北油田公司;長(zhǎng)江大學(xué)地球物理與石油資源學(xué)院;
【基金】：國(guó)家科技重大專項(xiàng)“冀中坳陷增儲(chǔ)領(lǐng)域地質(zhì)評(píng)價(jià)與勘探實(shí)踐”(2016ZX05006005-003)
【分類(lèi)號(hào)】：P618.13

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