In situ stress is an important factor of unconventional gas development, and it affects mainly geological structures. In the Linxing block, magmatic activity (in Yanshanian) led to the difference of reservoir property and unique distribution of in situ stress regime, which restricted the extraction of gas in deep coal measure strata. With multiple data sets (including imaging logging, fracturing reports, and seismic profiles), a one-dimensional mechanical earth model was established based on curvature–strain conversion model, and the influence of magmatic activity on in situ stress distribution was analyzed. The results showed that the in situ stress regime of coal seams was dominated by vertical principal stress, while the sandstone reservoirs showed regional differences. With the Zijinshan pluton as the center, the distribution of in situ stress regime showed obvious regularity. Vertically, the mechanical properties of strata around pluton have been strengthened, resulting in a 3-stage upward trend of maximum horizontal principal stress (S_Hmax) with depth, namely "normal (< 1500 m), slow (1500–1800 m), and rapidly (> 1800 m)", while 2-stage stepwise increases (without slow stage) were found on the limbs of the pluton. Regionally, away from the pluton, in situ stress regime transformed from reverse faulting to normal faulting. The magmatic activity also resulted to clockwise rotation of S_Hmax orientation (WNW), and it was about 45° relative to the other areas in the eastern margin of Ordos Basin (ENE). The high horizontal stress in deep reservoirs limited the formation of hydraulic fracture network, and so further unconventional gas extraction requires special reconstruction measures or it should be located away from the Zijinshan pluton.

地应力是非常规天然气开发的重要因素，主要影响地质构造。临兴区块（燕山期）岩浆活动导致储集层性质差异和地应力分布独特，限制了深层煤系地层瓦斯的开采。利用多组数据（包括成像测井、压裂报告和地震剖面），基于曲率-应变转换模型建立一维地球力学模型，分析岩浆活动对地应力分布的影响。结果表明，煤层地应力状态以垂向主应力为主，砂岩储层具有区域差异性。以紫金山岩体为中心，地应力状态分布呈现明显的规律性。纵向上，岩体周围地层的力学性质得到加强，最大水平主应力呈三级上升趋势（S _Hmax）随深度变化，即“正常（< 1500 m）、缓慢（1500-1800 m）和快速（> 1800 m）”，而在四肢上发现2级逐步增加（无缓慢阶段）冥王星。在远离岩体的区域上，地应力状态从反向断层转变为正断层。岩浆活动还导致S _Hmax方向(WNW)顺时针旋转，与鄂尔多斯盆地东缘(ENE)其他地区成45°左右。深层储层水平应力高，限制了水力裂缝网络的形成，非常规天然气的进一步开采需要特殊的改造措施或远离紫金山岩体。