Three diagenesis types are help to differentiate the middle caledonian and early hercynian karst , which are stylolite , dolomitization and dedolomitization . 2 ) karst identification symbols and karst reservoir of ordovician in bores , logging , well logging and fmi have been established . karst reservoir have been identified and evaluated in the tahe oilfield 2 )建立了奥陶系岩溶在岩芯、录井、常规测井和成像测井上的识别标志，以及岩溶型储层在以上方面的识别标志，并对研究区内岩溶型储层进行了识别和评价。
