Geology of Groningen Gas Field, Netherlands
Geology of Groningen Gas Field, Netherlands
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DOI：
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发表时间：
1970-11
期刊：
影响因子：
3.5
通讯作者：
A. Staeuble;G. Milius
中科院分区：
文献类型：
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作者：
A. Staeuble;G. Milius
Slochteren 1号井于1959年被发现，现在被称为荷兰北部的格罗宁根气田。该油田位于大型区域性荷兰北部高地的顶峰，该高地形成于晚基梅里亚构造阶段（晚侏罗世-早白垩世）。然而，有证据表明，该构造在较早时期，即三叠纪甚至可能是晚石炭世时期，是一个积极的因素。该储层不整合地覆盖在被认为是格罗宁根天然气主要来源的截断和强断裂的含煤宾夕法尼亚地层上。储层厚度为300-700英尺，由Rotliegendes组（下二叠统）的流质和风成砂岩和砾岩组成。这些粗碎屑层上覆盖着数千英尺的二叠纪zeechstein蒸发岩，尤其是岩盐，少量硬石膏和白云岩，构成了非常有效的储层密封。由于盐的剧烈运动，上覆的中生代和新生代地层的厚度从3000英尺到6500英尺不等。该油田占地18万英亩，目前估计储量为58万亿立方英尺。目前的生产潜力是每天20亿立方英尺的天然气，这些天然气来自9个“集群”，每个“集群”由大约6口紧密分布的井组成。砂岩有利的储层性质允许，至少目前，从构造最高的南部排水。
The Slochteren No. 1 well discovered in 1959 what now is known as the Groningen gas field in the northern Netherlands. The field is on a culmination of the large, regional northern Netherlands high which was formed during the late Kimmerian tectonic phase (Late Jurassic-Early Cretaceous). However, there is some evidence that the structure was a positive element during earlier periods, i.e., during Triassic and possibly even late Carboniferous times. The reservoir overlies unconformably the truncated and strongly faulted coal-bearing Pennsylvanian strata which are considered to be the main source of the Groningen gas. The reservoir, 300-700 ft thick, consists of fluviatile and eolian sandstone and conglomerate of the Rotliegendes Formation (Lower Permian). These coarse clastic beds are overlain by a few thousand feet of Permian Zechstein evaporites, notably rock salt and to a lesser extent anhydrite and dolomite, which constitute the very effective reservoir seal. Because of intensive salt movements, the thickness of the overlying Mesozoic and Cenozoic strata ranges from 3,000 ft to more than 6,500 ft. The field covers 180,000 acres, and the reserves now are estimated at 58 trillion ft3. Present production potential is 2 billion ft3 of gas per day from nine "clusters" of about six closely spaced wells each. The favorable reservoir properties of the sandstone allow, at least for the present, drainage of the field from the structurally highest southern part.