Abstract Shales with varying TOC content (0.5–26%) from the seventh member of the Triassic Yanchang Formation (abbreviated as Chang 7 shale) were artificially matured via semi-open pyrolysis to systematically study the characteristics of hydrocarbon generation, retention, and production under in-situ conversion process (ICP) conditions. The results show that with increasing Ro, the quantities of both generated oil and gas present an S-shape increase trend, with their generation rates reaching the maximum at 0.9 %Ro and 1.1 %Ro, respectively. The retention quantity and capability of oil and gas of shales first increase and then decrease as a function of thermal severity. With increasing TOC, larger amounts of oil and gas are retained, but the retention capability of the shale decreases. The shale simultaneously retains the largest amount of oil during the maximum oil generation period. The quantities of produced oil and gas share the same variation trend with the that of generated oil and gas, and the maximum oil and gas production rates are consistent with maximum generation rates. The greater the TOC, the greater the shale production potential. With increasing thermal maturity, the oil production potential of shales decreases slowly and then becomes relatively steady, while the gas production potential first changes slightly and subsequently decline rapidly. Based on the oil and gas generation-retention-expulsion characteristics, quantitative prediction models as a function of TOC and Ro are established, which will contribute to future engineering of the ICP.

中文翻译：

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ICP条件下页岩生-留-采特征及定量模型——以鄂尔多斯盆地长7段为例

摘要 采用半开式热解法人工成熟三叠系延长组七段（简称长 7 页岩）不同 TOC 含量（0.5%～26%）的页岩，系统研究其生、留、产特征。原位转化工艺 (ICP) 条件。结果表明，随着Ro的增加，油气生成量均呈现S型增加趋势，其生成速率分别在0.9%Ro和1.1%Ro时达到最大值。页岩油气的滞留量和滞留能力随热强度的变化先增大后减小。随着 TOC 的增加，更多的油气被保留，但页岩的保留能力下降。页岩在最大生油期同时保留了最大量的石油。产出油气量与产出油气量具有相同的变化趋势，最大油气产率与最大产率一致。TOC 越大，页岩生产潜力越大。随着热成熟度的增加，页岩的产油潜力先缓慢下降，然后趋于稳定，而产气潜力先小幅变化，后迅速下降。根据油气生-滞-排特征，建立了作为TOC和Ro函数的定量预测模型，为ICP的未来工程化做出贡献。产出油气量与产出油气量具有相同的变化趋势，最大油气产率与最大产率一致。TOC 越大，页岩生产潜力越大。随着热成熟度的增加，页岩的产油潜力先缓慢下降，然后趋于稳定，而产气潜力先小幅变化，后迅速下降。根据油气生-滞-排特征，建立了作为TOC和Ro函数的定量预测模型，为ICP的未来工程化做出贡献。产出油气量与产出油气量具有相同的变化趋势，最大油气产率与最大产率一致。TOC 越大，页岩生产潜力越大。随着热成熟度的增加，页岩的产油潜力先缓慢下降，然后趋于稳定，而产气潜力先小幅变化，后迅速下降。根据油气生-滞-排特征，建立了作为TOC和Ro函数的定量预测模型，为ICP的未来工程化做出贡献。TOC 越大，页岩生产潜力越大。随着热成熟度的增加，页岩的产油潜力先缓慢下降，然后趋于稳定，而产气潜力先小幅变化，后迅速下降。根据油气生-滞-排特征，建立了作为TOC和Ro函数的定量预测模型，为ICP的未来工程化做出贡献。TOC 越大，页岩生产潜力越大。随着热成熟度的增加，页岩的产油潜力先缓慢下降，然后趋于稳定，而产气潜力先小幅变化，后迅速下降。根据油气生-滞-排特征，建立了作为TOC和Ro函数的定量预测模型，为ICP的未来工程化做出贡献。