Multilateral junction with twisted mainbore and lateral bore legs

A well system, comprising:

• a main wellbore;
• a lateral wellbore extending from the main wellbore;
• a multilateral junction positioned at an intersection of the main wellbore and the lateral wellbore, the multilateral junction including;
• a y-block, the y-block including;
• a housing having a first end and a second opposing end;
• a single first bore extending into the housing from the first end, the single first bore defining a first centerline;
• and
• second and third separate bores extending into the housing and branching off from the single first bore, the second bore defining a second centerline and the third bore defining a third centerline;
• a mainbore leg having a first mainbore leg end coupled to the second bore and a second opposing mainbore leg end in the main wellbore;
• and
• a lateral bore leg having a first lateral bore leg end coupled to the third bore and a second opposing lateral bore leg end in the lateral wellbore, the mainbore leg and the lateral bore leg twisted with respect to the second bore and the third bore such that a first plane taken through centerlines of the second opposing mainbore leg end and the second opposing lateral bore leg end is angled by at least about ±15 degrees relative to a second plane taken through the second centerline and the third centerline.

A method for forming a well system, comprising:

• placing a multilateral junction proximate an intersection between a main wellbore and a lateral wellbore, the multilateral junction including;
• a y-block, the y-block including;
• a housing having a first end and a second opposing end;
• a single first bore extending into the housing from the first end, the single first bore defining a first centerline;
• and
• second and third separate bores extending into the housing and branching off from the single first bore, the second bore defining a second centerline and the third bore defining a third centerline;
• a mainbore leg having a first mainbore leg end coupled to the second bore and a second opposing mainbore leg end in the main wellbore;
• and
• a lateral bore leg having a first lateral bore leg end coupled to the third bore and a second opposing lateral bore leg end in the lateral wellbore, the mainbore leg and the lateral bore leg twisted with respect to the second bore and the third bore such that a first plane taken through centerlines of the second opposing mainbore leg end and the second opposing lateral bore leg end is angled by at least about ±15 degrees relative to a second plane taken through the second centerline and the third centerline.