论文部分内容阅读
对鄂尔多斯盆地下古生界岩芯和地表剖面的观察，８６块样品有机质ＴＯＣ和Ｒ_ｏ的测定与岩石学研究，代表性样品的ＸＲＤ（Ｘ射线衍射）测试，并与现代澳大利亚Ｃｏｏｒｏｎｇ湖白云石进行了对比研究，揭示出研究区：（１）白云石化均可发生在泥晶灰岩、膏盐岩及泥质砂岩中，可分为沉积准同生－成岩早期、深埋期和抬升期３种类型，其中以深埋期，晶胞小于３５μｍ类型的白云石化与气藏关系最大；（２）由膏盐岩次生的白云石与泥质流体穿过处有机质含量相对最高；（３）准同生白云石在向理想白云石演变过程中，晶体的有序度增大，有利于形成有效运移网络，当流体能量高时，以流体在其中运移和输送热量为主，当流体能量减低时，网络体系较大的容积空间有利于流体中有机质赋存．
Observations on core and surface sections of the Lower Paleozoic in the Ordos Basin, determination of TOC and R_o in 86 samples, and petrological studies and XRD (X-ray diffraction) measurements of representative samples were carried out and compared with the dolomite of the modern Australia Coorong Lake A comparative study revealed that: (1) dolomitization can occur in the dolomitic limestone, gypsum salt rock and argillaceous sandstone, which can be divided into sedimentary quasi-syngenetic-diagenetic early, deep-burial and uplifting 3 (2) dolomite and muddy fluid secondary to gypsum salt rock have the highest relative organic matter content; (3) dolomite is the most abundant type of dolomite, In the process of evolution to ideal dolomite, quasi-syngenetic dolomite increases the degree of orderliness of the crystal and is conducive to the formation of an effective migration network. When the energy of the dolomite is high, the fluid is mainly transported and transported in the dolomite. When the fluid When the energy is reduced, the larger volume of the network system is conducive to the presence of organic matter in the fluid.