本文選題：大安寨段　切入點(diǎn)：介殼灰?guī)r　出處：《西南石油大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：川中地區(qū)侏羅系大安寨段主要為致密灰?guī)r儲(chǔ)層,受到來自壓實(shí)、重結(jié)晶、膠結(jié)等成巖作用對(duì)儲(chǔ)層物性的破壞性影響,該儲(chǔ)層呈現(xiàn)出低孔、低滲、孔喉結(jié)構(gòu)多樣及非均質(zhì)性強(qiáng)等特點(diǎn),造成大安寨段儲(chǔ)層結(jié)構(gòu)復(fù)雜,儲(chǔ)層內(nèi)部孔縫的類型、特征多變,不利于致密油氣的勘探開發(fā)。因此川中地區(qū)產(chǎn)量要實(shí)現(xiàn)穩(wěn)產(chǎn)增產(chǎn),開展致密灰?guī)r儲(chǔ)層特征及測井評(píng)價(jià)具有很強(qiáng)的實(shí)際意義。論文以川中地區(qū)侏羅系大安寨段為研究層段,通過巖心、普通薄片、鑄體薄片、巖化實(shí)驗(yàn)等資料,分析致密灰?guī)r儲(chǔ)層儲(chǔ)集空間特征及類型,基于高壓壓汞分析致密灰?guī)r儲(chǔ)層的孔喉結(jié)構(gòu),并利用常規(guī)測井資料建立適用于侏羅系大安寨段儲(chǔ)層的物性及飽和度模型。此外,在儲(chǔ)集空間、孔喉結(jié)構(gòu)、裂縫特征的評(píng)價(jià)上,運(yùn)用經(jīng)驗(yàn)統(tǒng)計(jì)法、孔隙結(jié)構(gòu)分類法及產(chǎn)能約束法綜合確定儲(chǔ)層的物性下限,進(jìn)而分析致密灰?guī)r儲(chǔ)層類型及測井相特征。研究表明:(1)該地區(qū)主要巖性為介殼灰?guī)r,其中生物碎屑含量較高,主要為介形蟲、瓣鰓類、腹足類等湖相生物,在介殼灰?guī)r中常發(fā)育殼內(nèi)溶蝕孔和殼間縫。(2)儲(chǔ)層的儲(chǔ)集空間可按照其孔隙大小劃分為三種類型,以微孔發(fā)育較多�？缀斫Y(jié)構(gòu)以Ⅱ型為主,具有排驅(qū)壓力較高、中值壓力高、孔喉半徑小、喉道分選差的特征。裂縫以中等-微裂縫為主。利用常規(guī)測井建立儲(chǔ)層特征的電性劃分標(biāo)準(zhǔn),其中微孔及微裂縫在電阻率曲線上響應(yīng)明顯,區(qū)分效果好。(3)川中侏羅系大安寨段儲(chǔ)層孔隙度、滲透率的主要范圍分別為0.5%～1.5%和0.001÷10-3～1×1013μm2。其中儲(chǔ)層內(nèi)介殼灰?guī)r的物性較好,含泥介殼灰?guī)r的物性較差。并利用巖心孔滲數(shù)據(jù)及巖電參數(shù),建立儲(chǔ)層物性及飽和度參數(shù)的計(jì)算模型,取得了較好的效果,可更為有效的分析儲(chǔ)層類型。(4)大安寨致密灰?guī)r儲(chǔ)層可分為四類,其中Ⅰ類儲(chǔ)層的物性最好,多發(fā)育在大一段。通過對(duì)常規(guī)測井相特征的分析,當(dāng)測井相為箱型時(shí),多發(fā)育Ⅰ、Ⅱ類儲(chǔ)層;測井相表現(xiàn)為鐘型,多發(fā)育Ⅱ類、Ⅳ類儲(chǔ)層;當(dāng)測井相表現(xiàn)為漏斗-指型、明顯齒型時(shí),一般為Ⅲ類儲(chǔ)層。(5)通過儲(chǔ)層類型劃分標(biāo)準(zhǔn),應(yīng)用于中臺(tái)山地區(qū)時(shí),其大一段的SH2-SH6-SH1-SH4井一帶、大一三段的SH2-SH6-N16-N1 井一帶、大三段的 ZHT1-SH2-SH4 井一帶及 N14-N13-N9-N6 井一帶儲(chǔ)層發(fā)育最好,屬于Ⅰ類儲(chǔ)層,可成為勘探開發(fā)的重點(diǎn)地區(qū)。本論文為川中侏羅系大安寨致密灰?guī)r儲(chǔ)層的儲(chǔ)層特征、儲(chǔ)層參數(shù)計(jì)算、儲(chǔ)層類型、儲(chǔ)層測井相特征提供了一套研究方法,為研究區(qū)勘探開發(fā)提供了更加可靠的測井解釋依據(jù)。
[Abstract]:The Jurassic Da'anzhai formation in central Sichuan is mainly composed of dense limestone reservoir, which is affected by diagenesis, such as compaction, recrystallization and cementation, on the physical properties of the reservoir. The reservoir shows low porosity and low permeability. The diversity and heterogeneity of pore and throat structure make the reservoir structure of Da'anzhai section complex, the types and characteristics of internal pore fractures changeable, which is not conducive to the exploration and development of tight oil and gas. It is of great practical significance to develop tight limestone reservoir characteristics and log evaluation. This paper takes the Jurassic Da'anzhai formation in the central Sichuan area as the study layer, and through the data of core, ordinary thin slice, cast thin slice, lithology experiment, etc. The characteristics and types of reservoir space of dense limestone reservoir are analyzed. The pore throat structure of dense limestone reservoir is analyzed based on high pressure mercury pressure. The physical properties and saturation model suitable for Jurassic Da'anzhai formation reservoir is established by using conventional logging data. In the evaluation of reservoir space, pore throat structure and fracture characteristics, the lower limit of reservoir physical properties is determined synthetically by means of empirical statistics, pore structure classification and productivity constraint method. The study shows that the main lithology in this area is meso-shell limestone, in which the bioclastic content is relatively high, such as ostracia, lamellodes, gastropods and other lacustrine organisms. The reservoir space can be divided into three types according to the pore size of the reservoir. The pore throat structure is mainly type 鈪，

本文編號(hào)：1572662