The Chichali Formation encountered in Chanda 01 well, located in the Shakardara Kohat, Khyber Pakhtunkhwa Province of Pakistan has been studied in detail as a source for hydrocarbon. Nine drill cuttings of the formation were subjected to geochemical analyses and organic petrography. Various screening techniques including TOC analysis by using Leco-CS analyzer, Rock Eval pyrolysis and organic petrography were used to determine the quality, quantity, maturity and depositional environment of the organic matter. The total organic carbon (TOC) of samples from Chichali Formation ranging from 0.47 to 2.76?wt% indicate fair to very good source rock. Pyrolysis parameters resulted in S1values ranging from 0.21 to 0.83?mg/g of rock, S2 0.44 to 0.61?mg/g rock, PI 0.32–0.51 and Tmax442–448?°C. The Tmaxand vitrinite reflectance data (0.72–0.84 Ro %) indicate that Chichali Formation is effective source rock and is in the process of generating hydrocarbons and falls within oil window. Geochemical parameters Hydrogen index (HI), Oxygen index (OI), Tmaxalong with organic petrography analyses (maceral) are used for kerogen type evaluation. The calculated HI ranges between 31 and 54?mg HC/g TOC and OI 30–96?mg O2/g TOC. Using modified Van Krevlen diagram between HI vs OI of Rock Eval pyrolysis and maceral analyses, kerogen type II/III and transition between anoxic to oxic depositional environments is interpreted for the studied Chichali Formation.
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机译：在Chanda 01遇到的Chichali形成良好，位于Shakardara Kohat，Khyber Pakhtunkhwa Province of Pakistan of Pakistan是详细的，作为碳氢化合物的来源。形成形成的九个钻扦插，进行地球化学分析和有机岩。通过使用LECO-CS分析仪的各种筛选技术，包括使用LECO-CS分析仪进行岩石醇热解和有机岩体来确定有机物质的质量，数量，成熟度和沉积环境。来自奇异果形成的样品的总有机碳（TOC）为0.47-2.76≤wt％表示公平为非常好的源岩。热解参数导致S1值范围为0.21至0.83Ω·mg / g岩，S2 0.44至0.61Ω·mg / g岩，pi 0.32-0.51和Tmax442-448.°C。 Tmaxand vitriinite反射数据（0.72-0.84 ro％）表明Chichali形成是有效的源岩，并且处于产生碳氢化合物的过程中并落在油窗口内。地球化学参数氢指数（HI），氧指数（oi），具有有机透镜分析（丙酸）的Tmaxalong用于Kerogen型评估。计算出的HI范围在31和54？Mg HC / G TOC和OI 30-96？MG O 2 / G TOC之间。使用岩伐毒型热解和丙酸盐分析的改性van Krevlen图和丙烯酸盐分析，对于研究的Chichali形成解释了研究II / III的Kerogen II / III和缺氧沉积环境的转变。
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